Rubocop: Fixing style problems and adding check
rubocop - switch to 80 character limit and fixing offences
Rubocop: Fixing subscription and product files

Fixing subscription and product files. Also added some rake rubocop tasks.
Rubocop: Adding ignore for rubocop xml
Merge pull request #22 from daviddavis/temp/20140114165651

Rubocop: Fixing style problems and adding check