Add specific npm commands to run unit tests in only one browser at a time
Add specific npm commands to run unit tests in only one browser at a time

With `npm run test:unitp`, you run the unit tests only in PhantomJS.
With `npm run test:unitc`, you run the unit tests only in Chrome.
With `npm run test:unitf`, you run the unit tests only in Firefox.

autoNumeric/autoNumeric,autoNumeric/autoNumeric,autoNumeric/autoNumeric