[MOD] Removed shell script for storyboard localization.
Added missing methods from customColors category.
Added FlatButton class to the project.
Cleanup: moved files to subdirectories, removed obsolete graphics, added icons.
[FIX] Do not use seque to get back to previous controller. Use dismissviewcontroller instead.
[FIX] Use dismiss view controller instead of segue to logout.
[MOD] Changed login screen to match UX specification. Fixes CTFPAT-220