Got the installer working. Fixed a few bugs including a nasty-to-debug issue where the lang_id was being hardcoded during installation, resulting in strings being inserted with the wrong lang_id causing an infinfinite loop with fetch() throwing a "no strings" error and using template (which calls fetch()) to complain
(function(){tinymce.create('tinymce.plugins.AdvancedHRPlugin',{init:function(ed,url){ed.addCommand('mceAdvancedHr',function(){ed.windowManager.open({file:url+'/rule.htm',width:250+parseInt(ed.getLang('advhr.delta_width',0)),height:160+parseInt(ed.getLang('advhr.delta_height',0)),inline:1},{plugin_url:url});});ed.addButton('advhr',{title:'advhr.advhr_desc',cmd:'mceAdvancedHr'});ed.onNodeChange.add(function(ed,cm,n){cm.setActive('advhr',n.nodeName=='HR');});ed.onClick.add(function(ed,e){e=e.target;if(e.nodeName==='HR')ed.selection.select(e);});},getInfo:function(){return{longname:'Advanced HR',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/advhr',version:tinymce.majorVersion+"."+tinymce.minorVersion};}});tinymce.PluginManager.add('advhr',tinymce.plugins.AdvancedHRPlugin);})();