Fixed the tinymce will remove link tag issue.
Merge branch '4.3'
Change: Site.Current -> page.Site.
Redesign the custom tabs for site setting and page editing page.
Able to extend the top toolbar button on the pages.
Fixed the compiling issue reported: http://forum.kooboo.com/yaf_postst3331_4-3-compilation-error.aspx
Build 4.3.8.218
Merge branch '4.3'

Conflicts:
	Kooboo.CMS/CMSAssemblyInfoGlobal.cs
	Kooboo.CMS/Publish/Default/Properties/AssemblyInfo.cs
Fixed merging issue.
Fixed the Kooboo_CMS.js issue reported by Ronglin.
The global sidebar menu can be extended. #208 #233
Add "Keep content status" option on the sending setting editing page. #224
Update Lucene.Net to 3.0.3. Some API changes. #245
Run the broadcasting by sequentially.
Keep the broadcasted content as the same order as the source content.
Build 4.3.9 for hot-fix.
Merge branch '4.3'
* Change UserKey length to 256.
* Fixed Couchbase provider WhereIn clause issue.
Build 4.3.10.0225