closes #1556

added tag input box to composer when creating a topic
added new routes for viewing tags 'tags' and 'tags/:tagname'
respectively
post_bar.tpl shows the tags of the topic
can edit the main post to remove or add new tags
added a new menu item to header to go to the tags page
deleting a user will delete topic tags too
max 5 tags per topic

asdasd
remove punctuation and limit tag length
delete tag if it has no topics left
return topics tags #1557
latest translations and fallbacks
added no tags language key
added isSelf to account route
limiting user and group creation so that their slugs can't intersect.
closes #1558
upgrade tags to sorted set
closes #1557
closes #1555
fixes redirect loop for empty slugs
fixes reply/quote buttons on new posts
Update user.json
Merge pull request #1564 from MrHohenheim/patch-1

Update user.json
closes #1559

fixes the notification image too, the property was called image not
picture