[Fix] Use ActiveSupport::TestCase instead of ActiveModel::TestCase
Merge pull request #22 from seuros/master

[Fix] Use ActiveSupport::TestCase instead of ActiveModel::TestCase
Remove Gemfile.lock
Ignore Gemfile.lock as well
fix typo in README.md
Merge pull request #26 from damien-roche/master

fix typo in README.md
[Fix] App name cannot contain an underscore , closes #23
Merge pull request #25 from seuros/master

[Fix] App name cannot contain an underscore , closes #23