change branch alias
add composer.lock to .gitignore
Merge branch '2.0' of github.com:Bitnoise/BtnAdminBundle into 2.0

* '2.0' of github.com:Bitnoise/BtnAdminBundle:
  add btn_date form type, refactor btn_datetime
add node_modules and bin  to gitignore
add require-dev bundles and some settings
add hinting via grunt