Merge pull request #187 from ModernBB/version2.0

Merge version 2.0 with master
#191 Fix profile
#188 Fix "Board statistics" panel
#189 Remove old "About" information
#190 Add "Maintenance and security release" panel
Update backstage style
#196 Update announcement
Update language files
#197 Fix user profile settings interface
#207 Fix installation interface
#212 Fix search results
Update about
Tag ModernBB 2.0.1
#222 Fix db_update error pages
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#198 Fix broken url tags
removed Undefined index: unknown in profile.php
removed Undefined index: lang_admin_common from loader.php
No need for bootstrap.js in the header when it is already in the footer
Adding admin_menu before message function.
adding generate_admin_menu('database'); to message functions in database.php