Added Grunt automation tools

Not everything is working exactly as I'd like, but I think this is a
good enough starting point for automating monotonous stuff like Jasmine
testing and linting, and getting files ready for distribution
(uglifying, concatenating, etc.).

Future to-dos include automated version bumping (grunt-bump looks
perfect for this, once it's updated for Grunt 0.4.x) and cleaning up
Grunt's PhantomJS helper files.
Made specs targets more specific
Added bugs url to package.json
Merge pull request #25 from ndhoule/development

Added Grunt automation tools
Merge pull request #26 from ndhoule/proxies

Improved proxy tests; additional test passing