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
#210 Merge cache.php and cache_toolbar.php
#222 Fix db_update error pages
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Merge version2.0 into 2.1
#221 Update ModernBB slogan
#198 Fix broken url tags
Merge branch 'version2.0' into version2.1
removed Undefined index: unknown in profile.php