Support for code coverage with blanket.js

[selvakn]

With this, code coverage can be measured with blanket.js.

In a file called spec_cover.js under spec/javascripts, include the source files (with sprockets) which needs to be measured for code coverage.

Simple contents of a spec_cover.js
//= require application

Thoughts?

[selvakn]

Added readme and samples for code coverage with blanket.js

Please let me know if I can do anything for pulling this in.

[jejacks0n]

I like it, but I'm not likely to merge it.

So, I specifically started contributing to Jasminerice because it's a great little javascript testing solution for rails -- and I want to keep it simple and small. I've written a more advanced solution (Teabag) that does include coverage, and many more features.

That, the fact that we can't release new versions of the Jasminerice gem, and that with guard-jasmine/jasminerice you can already get coverage reports means that this functionality can be achieved without putting it into Jasminerice directly.

I'm basing this decision on what I think Jasminerice is really good at, and not based on the quality of this pull request. It's much appreciated, just doesn't fit with where I think Jasminerice fits in.