refs #687 @0.5
 * some refactoring of factories
 * added foreigner gem and changed constraints migrations
refs #694 @1.5
 * deletion of single page works when there are no children
fixed #694 @1.5
 * deletion of node with children moves child to next parent or root
refs #695 @0.75
 * inactive languages are not shown in tree
refs #699 @2.0
 * new page link is not there without an active langauge
fixed #704 @3.5
 * fixed bug in javascript not choosing right element
refs #695 @1.0
 * articles with deactivated language are now disabled
 * updated gems
refs #695 @2.0
 * info if there are pages in disabled languages
refs #696 @1.5
 * pages without translations are now automatically deleted
fixed #701 @0.75
 * fixed google preview not working on new page creation
fixed #705 @0.5
 * fixed letter count not counting
refs #703 @0.5
 * removal of delete translation button in form
refs #702 @2.0
 * changing preview button label
 * moving button into translation form fieldset
refs #698 @2.0
 * removed wrong indexes which prevented right behavior
fixed #695 @2.0
 * deactivated languages don't show in preview dropdown
refs #702 @1.0
 * WIP preview button functionality partly restored
fixed #702 @1.0
 * preview now works correctly