Merge tag '3.0.rc3' into develop

3.0.rc3
Fix slideshow image
Add logo credits
Use literals shortcuts for UTF-8 C strings
Add animation blocks
Merge branch 'feature/animation-blocks' into develop
Update documentation
Migrate existing GHUnit tests sources to XCTest target
Move test files outside the CoconutKit folder

Must not mix sources and resources for .staticframework packaging
Fix typo
Add principal bundle concept for running in XCTest
Enable Core Data validation in tests
 Fix test crash
Merge branch 'feature/xctest' into develop
Add Travis configuration file
Force using the iOS SDK for continuous integration
Use fixed time zone
Remove calendrical extensions

[NSCalendar currentCalendar] is immutable, but we can set a time zone on instances returned from [NSCalendar calendarWithIdentifier:]. Existing category methods are useless
Use consistent naming scheme
Check for failures to avoid crashes