Updates for Xcode 6.1 - Removing Compiler Warnings

Xcode 6.1 Compiler options added in order to help developers to find
and fix possible warnings.

Explicit cast to unsigned int were added in order to remove compiler
warnings.

options:UIViewAnimationCurveEaseOut
was replaced by
options:UIViewAnimationOptionCurveEaseIn

UITextAlignmentCenter
was replaced by
NSTextAlignmentCenter