object.observe polyfill added for latest versions of node

Thanks to @nexflo for adding this support in.

added unobserve methods

added unobserve methods to modules

Hotfix for set value of 0

there was a bug when setting an output value to 0

fixed and tested in this release

Hot fix for manager class

This release fixes an issue in the manager api which was causing crashes when a phidget was disconnected while connected with a type of PhidgetManager.

update to match npm

v2.2.0

prepping for release

First GitHub release

Just in case you don't want to use npm or github, you can download the release here. All documentation is also contained in the release package for the release version.