Update rails to version 4.2.0.rc1
Update sprockets-rails to version 2.2.2
Fix tests
Update haml to version 4.0.6
Update netrc to version 0.9.0
Update rake to version 10.4.1
Update rake to version 10.4.2
Update rails to version 4.2.0.rc2
Update rdoc to version 4.2.0
Update uglifier to version 2.6.0
Update netrc to version 0.10.0
Update rubocop to version 0.28.0
Update minitest to version 5.5.0
Update sass-rails to version 5.0.0
Update sass to version 3.4.9
Update rails to version 4.2.0.rc3