Support separate source map files

[rmehlinger]

Currently, the package requires that source maps be inline. However I'm using Babel rather than Browserify, and generating separate source map files. As a result, I have to run my babel compilation twice--once with inline maps for the benefit of Karma, and once with maps sent to separate files, for the main release. It'd be nice if instead I could have Karma reference separate map files.

[lddubeau]

Did you actually try it? I'm using it with a setup where I compile TypeScript to JS, with separate .map files, and it is working just fine after installing karma-source-map-support: the stack traces reported through Karma point back to the TypeScript code. (In case there's any doubt: before I installed karma-source-map-support the traces were pointing to the compiled JS code.)