Basic mongoid integration spec
Document lack of support for Mongoid 2.x
Update CONTRIBUTING.md

[ci skip]
Merge pull request #432 from haines/mongoid

Mongoid integration specs
typo in README menthod -> method
Merge pull request #433 from mikegee/patch-1

typo in README menthod -> method
fix delagate w/ prefix
Merge pull request #434 from mikegee/README-fixes

fix delagate w/ prefix
1.9 hash syntax

[ci skip]
Make gemspec consistent with README

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