Fixes dash.min.js build to include dependencies

* Updated README to include build / quick start instructions
* Updated GruntFile.js to include min dependent libs.
* Updated build, dash.min is updated and runs stand alone.

See [integration with kaltura player](http://kgit.html5video.org/pulls/442/modules/Dash/tests/Dash.qunit.html) with dash.js for stand alone example. Note this integration is very early sample ( stuff is broken ) but it did not run at all without this pull request adjustments to the dash.min.js build.