Corrected Ukrainian locale.

`uk` is the correct ISO 639-1 code for the Ukrainian language while `ua` is the ccTLD.
Merge pull request #166 from raymondjavaxx/master

Corrected Ukrainian locale.
removing self as an Observer from NSNotificationCenter
Merge pull request #169 from sticksen/master

removing self as an Observer from NSNotificationCenter
Merge branch 'master' of git://github.com/arashpayan/appirater