Make -show-breakpoints fixed so always shown in viewport
Merge pull request #15 from guardian/fixed-position-for-show-breakpoints

Make $mq-show-breakpoints fixed so always shown in viewport
Fix syntax for Libsass
Compile test
Add node-sass compilation instructions
Merge pull request #17 from kaelig/libsass3-support

Libsass v3 (& node-sass v1) support
add an option for overriding default media type in queries
Revert "add an option for overriding default media type in queries"

This reverts commit 9d6d3241499c500de4b476c46a46dfbb55508235.
Merge remote branch 'guardian/sass-mq'

Changes:
- Fixed syntax for Libsass 3
- Make `$mq-show-breakpoints` fixed to be always visible in viewport

Conflicts:
- _mq.scss