FuncUnit NPM module

To follow up on the discussion if FuncUnit should be an NPM module started in #40 I propose the following:

Provide FuncUnit itself (basically this repository) as an NPM module but additionally add a `funcunit` command line tool which lets you
- Run tests in different browsers (PhantomJS by default) on the command line using [Testee](github.com/bitovi/testee.js)
- Initialize the default HTML page plus the library
- Provide a server that gathers and runs all your tests

For example:

> funcunit run module.test.js --lib mocha

Will run the tests from `module.test.js` in PhantomJS using a default HTML test page with Mocha initialized (`module.test.js` has to be a valid Mocha test file of course) and report to the command line.

> funcunit run *.test.js --lib qunit --browser firefox

Will run all `.test.js` files in Firefox using a default HTML test page with QUnit initialized and report to the command line.

> funcunit server *.test.js --lib jasmine

Will start up a static webserver that when opened in a webbrowser will serve the default HTML page with Jasmine initialized and run all `.test.js` files in the current folder.

> funcunit init test/index.html --lib mocha

Will write the default HTML test page with Mocha and FuncUnit to `test/index.html`.