Handle unicode input in ACP

Item/layer names and descriptions can now contain unicode input.

Next step: find a function that reduces the amount of characters that
need to be typed in order to accomplish this. Or write one.

Closes #53.
Remove unnecessary whitespace
Fix titles for item add/edit in ACP
Update jQuery to 1.9.1
Update install.xml
Add 0.9.1 to UMIL install file (no updates)
Merge branch 'develop'
Merge branch 'master' of github.com:dellsystem/phpBB-dynamic-avatar