Added rspec-active-model-mocks to supply the mock_model the tests were requiring.

Part of me thinks this isn't going to work more than accidentally until I move to Rspec3, but we'll just have to find that out when I get there.
Replaced mock with double
Replaced stub! with stub
Replaced be_true with be true and be_false with be false
Removed obscure spec helper include since the inclusion is automatic.
Replaced be_true with be true
Replaced stub! with stub
Replaced Spec::Matchers with RSpec::Matchers
Merge pull request #389 from Paladin/deprecations

Deprecations Cleared.

Figure this can go right in as well, since it's mainly code cosmetics.