Merge pull request #132 from ModernBB/version2.0

Merge the changes from ModernBB/version2.0
Redesign registration
Profile menu, other language bugs
#88 Stop supporting updating for old versions

We have to keep on track and for ModernBB 2.0, that means that we've to
dump support for updating from PunBB 1.2, 1.3 and FluxBB 1.2, 1.3. It
seems to be a very good point, since the update file is now 42% lighter.
This commit also updates the design of the update message and fixes the
design for the "Finished" message.
Update installer with new design and more

With this commit, ModernBB will also be presented as version
2.0-beta.3-dev.1 instead of 2.0-beta.2.5.
#114 Remove quickjump from database
#111 Clean up Backstage header
#73 Add 5 emoticons and 13 BBCodes for emoticons
#112 Create user is now translatable
#112 Prune users is now translatable too
#91 Support MariaDB 5.3.4 and higher
Bugfix for header ankers
#134 Bug with unmarking reported posts
#131 Redirect messages
Rework the help page
Small fix for main.tpl
Language fix for userlist
#90 Remove all old and unneeded code

Serious clean-up. We've removed all old code from the Air theme that's
not used anymore.
A couple of bugfixes

I call this work "a sh*tload of bugfixes". Isn't it art-ish? :)
Style improvement for footer