Add support for Scala.js

[ssidorenko]

This PR allows the runtime to be compiled for Scala.js, allowing scoverage to work with Scala.js projects.

Use this example application to see it in action.

[sjrd]

csq: String

CharSequence doesn't make sense to JavaScript. Only String does.

[sjrd]

That's all I have on the Scala.js side of things.

[sjrd]

Note that, as of yesterday, there is a snapshot of Scalatest that supports Scala.js. To minimize changes, it might be a good idea to use Scalatest instead of uTest.

[ssidorenko]

For some reason, all tests pass on my computer but they don't on the travis server, any idea where that could come from ?

[sksamuel]

Travis breaks all the time in my experience. I'll check out this PR shortly, sorry for the big delay.

[ngbinh]

any update on this? Thanks

[holograph]

Pinging @sksamuel...

[naderghanbari]

Any updates on this?

[japgolly]

What's the status of this? If there is only a small amount of work remaining, or the remaining work is trivial, I might be able to pick it up and get it over the line. My work project could really benefit from this right now.

[sksamuel]

I've never used scala.js so don't know what is outstanding.

[lustefaniak]

Please take a look at #158, there are cleaned up changes to scalac-scoverage-plugin, required changes to sbt-scoverage are here: scoverage/sbt-scoverage#166 and tests that it works here: scoverage/sbt-scoverage#167