Implemented simple subdomain-based categories mechanism

And changed main page code to make it affect current banner.
Some changes in categories code
Changed navigation bar a little

Added way to change current category.
Values for new localization vars
Added banner for AT category
Changed stuff

Changed colors, removed subdropdown for categories, replaced
"Twilightandia" label with current category name.
Oh crap
Implemented way to disable CAPTCHA
Some changes in permissions code
Exported some new stuff
Adapted categories parsing code to new categories representation
Added values for new localization vars
Fixed wrong pages parsing in some cases
Fixed missing : in en.loc
Added missing permissions checks for all story related operations
Removed hover from navigation bar

I hate it. It messes up with my vimperator.
Implemented simple awards mechanism
Woops. Fixed small but nasty bug with wrong category value.
Added story status to UI.
Reset database username and password to default values