Merge pull request #114 from XhmikosR/master

Move jshint config and .jshintignore to Gruntfile.js.
Bump up minimum node version
Merge pull request #116 from eviltrout/node-version

Bump up minimum node version.

We should in theory still support node back to about 0.2 (at a guess) but with the new grunt-based build system in place we can no longer test this, and I'm not happy claiming we support something that isn't actively tested.