Permit overriding name, build, and project on a per-browser basis.

[krotscheck]

Browserstack uses the name property in the browser configuration
to uniquely name sessions within a specific build. If these sessions
do not have a unique name, and are executed sequentially (or with a
concurrency < total # of browsers), browserstack's UI will overwrite
previous results with new ones. In cases where a karma test run is
executed on multiple browsers, this isn't really desirable.

While I was at it, I also incorporated changes from #71, and
updated the README to also include documentation for that change. With
this patch, name, project, and build, may all be overridden on
a per browser basis.

[googlebot]

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[googlebot]

CLAs look good, thanks!

[krotscheck]

A note on the dependency update - it turns out that grunt-auto-release changed its grunt version requirement in 0.0.7, breaking peerDependencies in the project. For my patch to pass, I had to update the version to 0.0.6 (the last version that required grunt@~0.4).

[dignifiedquire]

Thanks