Marcin Zielinski

suggestion: simplify usage example

1

Really cool project but I've had a hard time trying to grokk what this package does by looking at the usage example because there's a lot going out there. Maybe...

function add(...values) { `...` token used in a parameter list is called _rest parameter_ --- ``` var values = Array.prototype.splice.call(arguments, [1]) ``` should be ``` var values = Array.prototype.slice.call(arguments), ```...

This pr adds some basic tests. It also adds travis-ci config file for automated testing.

### Why: I had a subdirectory in my dist folder and this plugin silently failed to clean the directory. `rimraf` is a battle-tested package that can deal with all kinds...