Merge branch 'fix/777'
Close #777

* fix/777:
  Added a missing )
  Added documentation for new feature
  Update examples and made the examples clearer
  Fixing zendframework/zf2-documentation#583
  consistency 'object oriented' should be 'object-oriented'
  fix typo
  Fixed RU typos
  Fixed NL typos
  Adding example code to the service manager introduction
  update index.rst
fix introductions title
import Zend\Validator in the code snippet
fix zf link: without www
Added more introduction test
Merge branch 'hotfix/#778' into develop
Merge branch 'fix/zend.form.quick-start' of https://github.com/garygolden/zf2-documentation into hotfix/#779
Merge branch 'hotfix/#779' into develop
Merge branch 'fix/zflinknonwww' of https://github.com/samsonasik/zf2-documentation into hotfix/#782
Merge branch 'hotfix/#782' into develop
Merge branch 'develop' of https://github.com/zendframework/zf2-documentation into develop