Expands test coverage previously marked as todo

  * Adds coverage to position, actions, and utils
Merge pull request #51 from squidpunch/test-coverage

Adds test coverage for actions
Undeprecated weak_ref_to_strong_ref, this is still needed. Added is_object_weak_ref?. Mod'd RubyMotionQuery::RMQ.weak_ref to not create a weak_ref of a weak_ref. It seems that RubyMotionQuery::RMQ.weak_ref is still needed. I submitted a bug report for RM. Removed the workaround on "weak_ref_is_same_object?" it entirely in later release.
Added block to .animate to simplify simple animation. Fixed distribute :horizontal
Added to readme for new animate feature and added a test
Added append! and create! methods, which return the view without using .get