renaming tags to tag in keywords
creating offensive_words #324
creating posts #328
creating comments #329
Adds capybara, factory girl and rspec gems for tests #321.

Conflicts:
	kidzen/Gemfile
Fixes syntax error in poll model in order to pass #321.
Removes deprecated locale buttons from application layout #321.
Adds test enviroment #321.
Adds test cases for supervisor and child signup #321.

Conflicts:
	kidzen/spec/spec_helper.rb
Names children signup path #321.
Fixes label for username fields #321.
Names parent signup path #321.

Conflicts:
	kidzen/config/routes.rb
Merges migrations for updates #266.
Sets up test enviroment #266.