adding the validation for single special character in attribute #70
adding the any quoted to the fix #70
Merge branch 'issue_parsing_special_characters_70' of github.com:joseluistorres/csscss into joseluistorres-issue_parsing_special_characters_70
Removes unnecessary parens and whitespace
Adds CHANGELOG entry for Jose's bug fix and lists him in CONTRIBUTORS
Bump ruby version to latest v2
Upgrade debugger version

This is failing in travisci, I assume it's because it's using an older
version