Update README.md
Merge pull request #5 from ChrisWren/master

Added some changes to the README
fix(README): missing colon in json

Missing a colon on the template field. Fix.
Merge pull request #8 from philips/patch-1

fix(README): missing colon in json
add --save-dev to npm install
Added Travis CI
Create HISTORY.md
Merge pull request #6 from kuzmisin/master

Fix mistyped option name extenstion -> extension