Update to work with BoneScript 0.2.4 and specify BSD license

I think the biggest deal is confirming that you'd be OK with a BSD license as annotated in the package.json. You can now use 'npm install -g' and 'require("Nokia5110")' anywhere, such as in a program you drop into /var/lib/cloud9/autorun.

I'm using the version of BoneScript currently at http://github.com/jadonk/bonescript. The biggest dependency for a newer version is the bugfix in shiftOut() (https://github.com/jadonk/bonescript/commit/96811a4e00f20e06a77e3cb76e0952a636d4cb8a).

I believe eliminating globals and delays is desirable. I am still looking to do some performance enhancements.