Add warning in installer for PHP < 5.2.0; hopefully fix validation of e-mail addresses with dashes
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<td><span class="title">Common buttons</span></td>
<td align="right"><a href="index.htm"><acronym title="Table of contents">TOC</acronym></a></td>
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Below is a short description about each button.
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<td><img src="../../images/bold.gif" width="20" height="20" alt="Bold text icon" /></td>
<td>Bold text style (Ctrl+B).</td>
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<td><img src="../../images/italic.gif" width="20" height="20" alt="Italic text icon" /></td>
<td>Italic text style (Ctrl+I).</td>
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<td><img src="../../images/underline.gif" width="20" height="20" alt="Underline text icon." /></td>
<td>Underline text style (Ctrl+U).</td>
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<td><img src="../../images/strikethrough.gif" width="20" height="20" alt="Strikethrough text icon." /></td>
<td>Strikethrough text style.</td>
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<td><img src="../../images/justifyleft.gif" width="20" height="20" alt="Align left icon." /></td>
<td>Align left.</td>
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<td><img src="../../images/justifycenter.gif" width="20" height="20" alt="Align center icon." /></td>
<td>Align center.</td>
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<td><img src="../../images/justifyright.gif" width="20" height="20" alt="Align right icon." /></td>
<td>Align right.</td>
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<td><img src="../../images/justifyfull.gif" width="20" height="20" alt="Align full icon." /></td>
<td>Align full.</td>
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<td><img src="../../images/bullist.gif" width="20" height="20" alt="Unordered list/bullet list icon." /></td>
<td>Unordered list/bullet list.</td>
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<td><img src="../../images/numlist.gif" width="20" height="20" alt="Ordered list/numbered list icon." /></td>
<td>Ordered list/numbered list</td>
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<td><img src="../../images/outdent.gif" width="20" height="20" alt="Outdent/decrease indentation icon." /></td>
<td>Outdent/decrease indentation.</td>
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<td><img src="../../images/indent.gif" width="20" height="20" alt="Indent/increase indentation icon." /></td>
<td>Indent/increase indentation.</td>
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<td><img src="../../images/undo.gif" width="20" height="20" alt="Undo the last operation." /></td>
<td>Undo the last operation (Ctrl+Z).</td>
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<td><img src="../../images/redo.gif" width="20" height="20" alt="Redo the last operation icon." /></td>
<td>Redo the last operation (Ctrl+Y).</td>
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<td><img src="../../images/link.gif" width="20" height="20" alt="Insert a new link icon." /></td>
<td>Insert a new link, read more about this function in the <a href="insert_link_button.htm">Insert
link section</a>.</td>
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<td><img src="../../images/unlink.gif" width="20" height="20" alt="Unlinks the current selection icon." /></td>
<td>Unlinks the current selection/removes all selected links.</td>
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<td><img src="../../images/anchor.gif" width="20" height="20" alt="Insert a new anchor icon." /></td>
<td>Insert a new anchor, read more about this function in the <a href="insert_anchor_button.htm">Insert anchor section.</a></td>
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<td><img src="../../images/image.gif" width="20" height="20" alt="Insert a new image icon." /></td>
<td>Insert a new image, read more about this function in the <a href="insert_image_button.htm">Insert
image section</a>.</td>
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<td><img src="../../images/cleanup.gif" width="20" height="20" alt="Cleanup code icon." /></td>
<td>Cleanup code/Removes unwanted formating. This function is useful when
you copy contents from for example a office product.</td>
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<td><img src="../../images/help.gif" width="20" height="20" alt="Show help icon." /></td>
<td>Shows this help window.</td>
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<td><img src="../../images/code.gif" width="20" height="20" alt="Source code editor icon." /></td>
<td>Opens HTML source code editor. </td>
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<td><img src="../../../../plugins/table/images/table.gif" width="20" height="20" alt="Insert table icon." /></td>
<td>Inserts a new table at the current location. </td>
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<td><img src="../../../../plugins/table/images/table_insert_row_before.gif" width="20" height="20" alt="Adds a row above icon." /></td>
<td>Adds a row above the current one. </td>
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<td><img src="../../../../plugins/table/images/table_insert_row_after.gif" width="20" height="20" alt="Adds a row under icon." /></td>
<td>Adds a row under the current one. </td>
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<td><img src="../../../../plugins/table/images/table_delete_row.gif" width="20" height="20" alt="Remove row icon." /></td>
<td>Removes the row. </td>
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<td><img src="../../../../plugins/table/images/table_insert_col_before.gif" width="20" height="20" alt="Add column before icon." /></td>
<td>Adds a column before the current one.</td>
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<td><img src="../../../../plugins/table/images/table_insert_col_after.gif" width="20" height="20" alt="Add column after icon." /></td>
<td>Adds a column after the current one.</td>
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<td><img src="../../../../plugins/table/images/table_delete_col.gif" width="20" height="20" alt="Remove column icon." /></td>
<td>Removes the current column.</td>
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<td><img src="../../images/hr.gif" width="20" height="20" alt="Insert horizontal ruler icon." /></td>
<td>Inserts a new horizontal ruler </td>
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<td><img src="../../images/removeformat.gif" width="20" height="20" alt="Remove formatting icon." /></td>
<td>Removes formatting from the selection. </td>
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<td><img src="../../images/sub.gif" width="20" height="20" alt="Subscript icon." /></td>
<td>Makes the selection to be subscript. </td>
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<td><img src="../../images/sup.gif" width="20" height="20" alt="Superscript icon." /></td>
<td>Makes the selection to be superscripted. </td>
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