Added optional SQL queries debug
Better caching
Closed #30
Closed #9
Closed #17
Closed #22
Closed #23
Faster queries, fixed foreign keys

When user is removed, their posts and comments get null user ID now
Small changes to users presentation

- Fixed W3C validation in user list
- Fixed post CSS were not included
- Added link to delete account under "options" (for consistency sake)
Closed #29
Fixed comment removal
Added upper limit for user and tag length
Closed #35; various tweaks

- All form.aligned inputs got wrapped with special div for easy width control
- Fixed edit jump bug
Closed #41
Closed #14
Changed titles a bit