modified scss to work with libsass

- always including sources content
- still need to write file since that's the only way source maps work
- also started to fix main function to work with new scss API
scss finished including inlining sources
sass resolve working

- all tests pass
- much simplified API since we always include sources content and never write css or map file
- need docs update
fixing inline sourcemap tests
examples, jsdoc improvement and updated README
making inline sourcemap tests less brittle
fixing docme links
2.0.0 uses libsass