* Made the documentation directory structure a bit more logical by moving 'docs/en/root.txt' to 'docs/en.txt'.
* Found two more sections from the old documentation that are not yet converted to the new format.

- Added Sensei_Exception

* Fixed a few layout bugs in new documentation
* Fixed documentation table of contents indentation bug in IE6 (fixes #344)
* Fixed a parser bug in Sensei_Doc_Section
* Restructrured a bit some files of the documentation.