Update documentation, in prep for import of Joomla
Added K2 2.6.6 (current release)
Imported Joomla 1.7.3
Imported Joomla 2.5.0
Imported Joomla 2.5.1
Imported Joomla 2.5.2
Imported Joomla 2.5.3
Imported Joomla 2.5.4
Imported Joomla 2.5.5
Imported Joomla 2.5.6
Imported Joomla 2.5.7
Imported Joomla 2.5.8
Imported Joomla 2.5.9
Imported Joomla 2.5.10
Imported Joomla 2.5.11
Imported Joomla 3.0.0
Imported Joomla 3.0.1
Imported Joomla 3.0.2
Imported Joomla 3.0.3
Imported Joomla 3.0.4