0.7.4-beta1: create a release for early testing

0.7.3

* Speed up loading by lazy-loading several modules not frequently used
* boneai.js is just data, not used anywhere right now

src/bonescript: make myrequire file scoped

Merge branch 'master' of github.com:jadonk/bonescript

Bump serialport to 6.0.5, node to 6.0.0 and make new release

Bump systemd to 0.3.1 and make new release

Fix version

Disable roboticscape for now