* Try to support pre-release versions of rails, starting from 4.0.0.beta1
! Fix number of arguments can be passed in private method
Merge branch 'rails-prerelease-version-support'

* rails-prerelease-version-support:
  ! Fix number of arguments can be passed in private method
  * Try to support pre-release versions of rails, starting from 4.0.0.beta1