Fix typo in English translation

s/writen/written/
Fix typo
Merge pull request #530 from garethrees/patch-1

Fix typo
Update rails to 4.1.7 security patches that can affect our users
Merge pull request #532 from publify/update_rails_security

Update rails to 4.1.7 security patches that can affect our users
Only 1 ruby per minor, respect Travis free queue ;)
Update readme
Track cache folder in git

Rails.cache.clear fails when the cache path doesn't exist
It causes random failures in Travis CI
Merge pull request #533 from pvcarrera/track-cache-folder

Track cache folder in git
Merge pull request #526 from stevenwilkin/fix-typo-in-english-translation

Fix typo in English translation
Handle correctly tags like lang:FR which will become Tag with {name: 'lang-fr'}. It fixes #529
Merge pull request #534 from publify/Tag_with_colon

Handle correctly tags with colon
Add my beloved better_errors gem for development group. Close #367