Merge tag '0.1.0' into develop

0.1.0
Add utf-8 comments.
Add reek task.
Suppress the UncommunicativeModuleName smell of Text2048 module.
Refactor.
Refactor.
Add link to the official 2048.
Add some badges.
Enable Travis.
Add rake.
Add Travis badge.
Refactor.
Refactor.
Refactor.
Refactor.
Refactor.
Refactor.
Refactor.
Refactor.
Refactor.