Ran rubocop on the gem itself!
Rubocop tasks
Added the checkstyle_formatter for using rubocop w/ Jenkins
Bumped version, set a homepage
Misunderstood how lint/rails included/exlcuded cops.

Basically --lint _only_ runs the lint cops, while --rails _also_
runs the Rails cops. So, if we really want to do **everything** then
we need to include --rails. Therefore, it's not necessary to have
Rails-only task.
The CI process should also run the Rails cops.
Merge pull request #1 from mrchucho/feature/rubocop

Feature/rubocop