Add grunt-karma as follows:
Add grunt-karma as follows:

    $ npm install grunt-karma --save-dev

This is because the following error occurred when running `grunt test`:

    Warning: Task "karma" not found. Use --force to continue.

    Aborted due to warnings.

The work-around is documented in the following issue:
https://github.com/yeoman/generator-angular/issues/793

cjerdonek/quick-sampler