Declare character encoding to prevent invalid US-ASCII character error
Merge pull request #10 from ArekBartnik/master

Declare character encoding to prevent invalid US-ASCII character error
Bump up to 2.0.1
Fix return to warn
Merge pull request #13 from jpavon/patch-1

Fix return to warn
Merge remote branch from 'guardian/sass-mq'

Changes:
- Added character-encoding declaration from ArekBartnik #10
- Fixed `@return` for `@warn` from jpavon #13