Test with various versions of rails
Make .icon-check optional for compatibility with Rails 4.2
Merge pull request #88 from projecthydra-labs/rails-4.2

Fix errors when running on rails 4.2. Fixes #87
Bump version to 0.7.1
Rename scss file to remove extra .css
In sass-rails 5.0 (Rails 4.2) this raises a deprecation warning
Fixes #86