Introduced an example of how the end-user documentation would like for CKEditor widget.
re #692
Added a first draft for converter from XML documentation to PHP page for documentation website.
re #692
Several additions to XML->PHP transformation
re #692

Added ln, pn, wn, p@label. Corrected formatting in opening PHP block. Removed `ctboost` prefix on sections.
Added "yiidoc" element support to XML->PHP transformation.
re #692
Added support for property list building in XML->PHP transformation
re #692

Also added support for `a` and `em` tags.
Moved XML documentation to subfolders along with the example snippets.
re #692
Added support for `github-issue` element in XML documentation.
re #692
Introduced a clean script and removed generated PHP files from `.gitignore`
re #692
Added XML documentation and examples for `TbHighCharts`
re #692

It will be added to documentation website, too.
Note that in previous commit there were change from `CJavaScript::jsonEncode` to `CJavaScript::encode` when processing options for `TbHighCharts`
closes #696 re #345
Merge remote-tracking branch 'origin/master'