Add counter caching.
counter caching: Add more conventional syntax: belongs_to :association, :counter_cache => true
We don't support rspec 3 yet.

Revert "Fixed other rspec depprectations (its)"

This reverts commit b25f18d1cf77dfe0a96cd3d01c30a21e093b77c1.

Revert "Fixed be_false -> be_falsey deprecation warning in specs"

This reverts commit 11a512abf822c1db912ba777b387c519cb9e0f22.

Revert "Fixed be_true -> be_truthy deprecation warning in specs"

This reverts commit d6bc31ef7b179d57ff0dd47c84bc83bb940be98f.
Remove trailing whitespace
Merge branch 'master' of github.com:mongomapper/mongomapper