More content on deploy
closes #67.
fk: add docs (active record migrations).
4.2 release notes (fk support)
Review action view overview.md
Translating action view overview.md
:scissors: Rakefile
Add deploy key permission using bcrypt.
Translator does not need to clone the github pages repo.
DRY
Remove w3c validator.
Use amatch gem to calculate levenshtein.
Update levenshtein method.
Update getting started.md
Update english guide.
Sync migrations.md
Sync engines.md
Update migration guide to latest (fk support).
closes #68.
Sync 4.2 release notes.
closes #64.
Mark command line & 4.2 release notes as translated.
Revert "Add deploy key permission using bcrypt."

This reverts commit cdb68080fc77578e963b1a02c60f9e2638af6c48.

Conflicts:
	Gemfile
	Gemfile.lock