Uses modern Objective-C syntax.
Removes files not in use.
Removes submodules.
Suppresses warnings.
Fixes UI layout on iOS 7.
Updates localization.
Updates icons.
Modifies font settings.
Tunes UI layout.
Updates images.
Updates project setting.
Suppresses warnings.
Cleans-up source code.
Cleans-up source code.
Cleans-up source code.
Adds .travis.yml.
Updates .travis.yml.
Updates README.md.
Merge pull request #1 from swem/master

Revise some error in unit test. And support default proxies.