Add IBM Watson support

[zoecarver]

Watson Support

This commit adds support for the IBM Watson STT API which is very fast and accurate. I modeled it very closely after the wit.ai implementation.

Disclamer!

Test every commit on a Raspberry Pi. Testing locally (i.e., on OS X or Windows or whatnot) is insufficient, as you'll often run into semi-unpredictable issues when you port over to the Pi. You should both run the unit tests described above and do some anecdotal testing (i.e., run Jasper, trigger at least one module).

This has not been tested on a Raspberry Pi. I do not have a Raspberry Pi, but I thought I would make a PR anyway incase someone else wanted to test it on their Raspberry Pi for me.