Merge branch 'hotfix/4.2.1' into develop
Merge branch 'hotfix/4.2.2' into develop
Merge branch 'hotfix/4.2.3' into develop

* hotfix/4.2.3:
  Updated CHANGELOG Bumped VERSION to 4.2.3 * Added gem badge * Updated dependencies
support mongoid 4
drop support mongoid 3
* Updated README
* Updated LICENSE
* Added CONTRIBUTING guidelines
* Added .editorconfig
Merge pull request #5 from chamnap/master

Support mongoid 4
Added new line at the end of the file
Changed version to 5.0.0.alpha1
Closes #3
Merge branch 'release/5.0.0.alpha1'

* release/5.0.0.alpha1:
  Changed version to 5.0.0.alpha1 Closes #3
  Added new line at the end of the file
  * Updated README * Updated LICENSE * Added CONTRIBUTING guidelines * Added .editorconfig
  drop support mongoid 3
  support mongoid 4