New formula for snappystream
Updated to version 0.1.2, added test, fixed quotes
Added 'test do' block with compression test

- Removed check build option and therefore always perform a test
- Added a modified example from snappystream's README file.
Test compresses a file, decompresses file and checks a diff.
Fixed indent, error checking
snappystream: add 0.1.2 bottle.