Kunena30/Joomla30 Backend: Dashboard button, icons, and copyright

-Fixed Dashboard FIRST and LAST button CSS Selectors.  This was inherited from the Bootstrap UI Library.  We still want to treat these as buttons however we do not need the same styling. vAlso fixed a wrapping issue with buttons.
-Added Dashboard remaining manager buttons.
-Updated copyright year to 2013
Kunena30/Joomla30 Backend: Ranks updated variables to be consistent with other Models.
Kunena30/Joomla30 Backend: Ranks reordered short options to reflect column listings.
Kunena30/Joomla30 Backend: Attachment filter implementation.

-Updated model to follow Joomla 2.5+ parent class structure.
-Added FILTER implementations in the Model, View, and Template.
-Added SORT implementations in the Model, View, and Template. (NOTE: Sort is still broken for data pulled from other tables.
-Updated pagination implementation to follow Joomla 2.5+.
Kunena30/Joomla30 Backend: Configuration conversion to XML.

-Added all configuration options to XML (Should be able to access configuration through Joomla configuration options now, save will not work until JForm implementation) (Kunena is still using old configuration implementation, needs to be updated to JForm).
-Added updated language key naming standards and improved a few strings to be reusable with a naming structure.
Merge branch 'master' of git://github.com/Kunena/Kunena-2.0
Merge remote-tracking branch 'coder4life/master' into k30_bugs8
Kunena30/Joomla30 Backend: Add languages strings where needed