feat(index.js): replace map-stream with through2

remove map-stream in package.json
chore(.travis.yml): remove node 0.9 support

* this closed #7 by rebase
* travis no longer supports/installs node 0.9
* see https://github.com/travis-ci/travis-ci/issues/2251
chore(Makefile): add type arg to gulp release
chore(release): ac1931bbb6 by Makefile