Merge pull request #8 from taylorleese/master

Support filtering via environment variables
updates travis config
updates version
updates version for running tests
prepare release 0.3
prepare 0.4 snaphot
Merge pull request #9 from taylorleese/master

Updated readme
run only 2.9.2 builds for now on travis
publish to Sonatype OSS repo see #11
skips PGP signing on Travis CI
fixes Travis script
adds info about the Sonatype OSS repo 

see #11 for more info
adopted to sbt 0.13
Merge pull request #12 from lbalamut/master

adopted to sbt 0.13
prepare release 0.4
prepare 0.5