Add dependency on sass
Look for `.scss` path

Render it if it exists
Merge branch 'master' into compile-scss
Add to integration test and dummy app

Tests for scss compilation
Use symbol instead of string to declare sass syntax

Must be a symbol
Remove return from block in StylesheetProcessor

Caused return from entire method
Fix broken integration test
Unit test
Update README

For SASS
Minor readme changes
Merge branch 'compile-scss'