Canary replace literal strings with constant strings

This PR is mainly centered around Jasmine and Istanbul. 
* I put their dependency references in the correct place in package.json, 
* added code to create symlinks to their executables rather than expecting global installation, 
* and added a .jshintrc file to tell JSHint how to provide useful style warnings.

I also changed the string 'pollUpdate' to a constant value, and created a unit test on brain.js as I begin to figure out how that whole unit-test thing is gonna go.