v0.5.3 hotfix.

Of course this can't be merged directly into master - but given the incompatibility with `grunt-jasmine-requirejs-template` mentioned in #114, we really could use a v0.5.3 so that those of us using it can upgrade to the latest `grunt-lib-phantomjs` and get the `outfile` fix.

I've kept this in `hotfix` and tagged as v0.5.3 locally - it would be really nice to have that in this repo and published on npm as 0.5.3.