change the version of the engine accordingly
the slug of a content entry can include underscore(s)
close #747
close #748 (Fields of type email not sent in notification)
fix issue #744 (new version of the mongoid-tree gem) + fix tests
bump version to 2.2.2
Czech translation
Translate "czech" to other languages in admin_ui.
Fix whitespace after chinese.
Fix keys in czech translation.
Add czech translation to configuration and generator.
Add czech flag.
Add common czech translations, taken from svenfuchs/rails-i18n.
Swap quotes.
add a test to prove link_to works with a custom label
Merge pull request #757 from muhal/master

Add czech translation
Merge branch 'master' of github.com:locomotivecms/engine
typo in a I18n cs file