Add: `LayerTouchable` module for `Joybox::Core::Layer{,Color}`
Adding wiggle action as series of rotations
giving a reasonable duration
Rename: `LayerTouchable` module to `TouchEvent`
Add event module separated from `layer.rb`. Add LayerColor.
Fix typo.

  * `Menu#align_items_vertically_with_padding`
Add specs for events.
Merge pull request #58 from meganemura/fix-typo-ui-menu-spec

Fix:
=> Fix typo in spec
Merge pull request #57 from meganemura/fix-joybox-ios-core-layer

Add:
=> Separate some methods about touch from `motion/joybox-ios/core/layer.rb` for mix-in to other Layer class
Merge pull request #55 from GantMan/master

Add:
=> Wiggle action as series of rotations