Merge branch 'release/v0.2.0' into develop
More comments and whitespace
Fixed Issue #1 – completion blocks doesn't work

Create fake view and animate its alpha property to ensure the completion block is invoked after the delay+duration interval.
Fixed Fix of Issue #1 – completion blocks doesn't work

Create fake view and animate its alpha property to ensure the completion block is invoked after the delay+duration interval.
Fixed timing function detection and pre-set animation duration
Support for nested animations (Issue #2)

Including overriding inherited duration and curve
Add convenience options accessors and pre-set animation respects repeat and autoreverse options
Fix inverted repeat option and improve the example
Update README with new features
Merge branch 'release/v0.3.0'