Build script

Buildscript support - #14

Started out with yeoman webapp grunt file. Removed stuff we don't use.

Added a .couchapp_deploy file (optional) so ```grunt couchapp``` will deploy to the right place. Example options are (if not provided it'll use a localhost:5984 default):

    {
      "port": 12345,
      "auth": "fake_username:fake_password",
      "hostname": "fake_hostname"
    }

```grunt watch``` will monitor for file changes and do a ```grunt jshint``` and/or ```grunt couchapp``` as appropriate

Down the road todo:
* #17 - Add jsduck support for build script
* Add tarball support