scss_formatter should extend Expanded
prepare 0.1.1 release
fixes #70 - expression evaluation

Note: it's closer to scss 3.3.14 / 3.4.0rc3 behaviour than 3.2.19
fix color division (see 3.2.19/3.3,14/3.4.0rc3)
Change include/require to include_once/require_once
added compileFile() and checkCompile() for #148 and #132
make VERSION a const
Add version file
Add "compact" formatter (for completeness)
add some docblocks (refs #83)
TODOs
remove unused "use" statement
Update version