Bullet should not automatically require ActiveRecord / Mongoid. Currently Bullet forces these libraries to be required in your application, however, this is not a good practice since many apps many want to intentionally exclude one of these libraries (like mine). Instead, it is better to check if they are already defined (which would have been done earlier in the Rails initialization chain)
Rescue load error to fix Travis CI
Merge pull request #110 from johnnyshields/master

Bullet should not automatically require ActiveRecord / Mongoid