Cleanup, Template, Backwards compatibility, BlogEntry, SelectPostOption

* Cleanup; removed deprecated motd features and comments, removed
obsolete language files, Archive.php and Home.php now redirect to
pagetemplate too
* Template; added content_postid as part of site wide elements
* Template; no more "default" headers, sidebars, footers (cleanup)
* SelectPost option now supports (optionally) subposttypes
* BusRuleCategory; fixed bug (only triggered when is_singular occured,
instead of if_archive)
* BlogEntry rewritten (no longer depends on seperate PHP files)
*