Changed navigation bar style and background colour conform to the given corporate identity colours. Also did some refactoring for AppDelegate class and added missing comments.
Changed navigation bar style and background colour conform to the given corporate identity colours. Also did some refactoring for AppDelegate class and added missing comments.

corchwll/amos-ss15-proj5_ios,corchwll/amos-ss15-proj5_ios,corchwll/amos-ss15-proj5_ios