Made changes to be compatible with libsass

Libsass has issues with this statement inline i.e. "error: non-terminal statement or declaration must end with ';'"

Splitting the line into two fixes the issue, without breaking the ruby scss standard
Updated lib sass compatibility
Adding install script for libsass
Upgraded doubleshot
Breaking down SASS test but running into doubleshot bug
Beginning conversion to mocha
Completely transitioned to mocha
Introducing libsass test, reproduces bug from #19
Merge remote-tracking branch 'origin/pr/19' into dev/test.libsass.19
Realizing this patch was for SCSS, not SASS
Relocated libsass test to SCSS
Removed .only
Removed quotes, added patch to SASS template, and updated test files
Updated CHANGELOG
Release 4.2.0