Prepare an app release for iOS7

Closed - This job posting has been filled and work has been completed.

Job Description

I need my app to be prepared for iOS7. What I need to be done:

1) Make all necessary interface and code modification for iOS7.
2) Make it possible for an app tab bar to look different for "before-iOS7" OS.
3) Review the code to make appropriate changes to support newer OSs.

As app interface is in Russian, whould be better if you are a native speaker or understand Russian.