Theme-check new version

20110412.1 Finaly gets a release!

• Fix regex’s
• Added check for latest footer injection hack.
• Fix tags check to use new content function correctly
• Sync of all changes made for wporg uploader theme-check.
• Updated checks post 3.1. added screenshot check to svn.
• Fix links check to not return a false failure in some cases
• rm one of the checks that causes problems on wporg uploader (and which is also unnecessary)
• Move unneeded functions out of checkbase into main.php.
• Minor formatting changes only (spacing and such)
• Add check for wp_link_pages() + fix eval() check