feat(rat): add rat quest
fix(i18n): fix #3461
refactor(quests): cleaner buyable quest eggs html
fix(quests): don't allow questStart on already-started quests
fix(quests): temporarily send error email on questStart (if already
started), see #3451. Revert later
fix(i18n): callback => next
fix(i18n): signup, clone default tasks
Merge branch 'develop' of https://github.com/HabitRPG/habitrpg into develop
chore(bailey): bailey on level-100 cap
feat(chat): allow banning problem users from chat rooms
fix(filters.jade): prevent duplication of new tags

Remove ng-submit='createTag(_newTag)' as it duplicates the action of
ng-click='createTag(_newTag)’ resulting in two new tags being created.
fix(i18n): fix /content api call
Revert "feat(todo_archive)" (see http://goo.gl/mCygbz)
feat(hall): click hero name for modal. fixes #3478
fix(footer): update github link

Link updated to https://github.com/HabitRPG/habitrpg/issues/2760