v2.0.3

• Move node-pre-gyp binaries away from Amazon S3 to Github Releases page
• Fix for missing node-pre-gyp binaries, especially for windows users, since the 2.0.0 refactor which forced windows users to build from source -- generally failing due to lack of dependencies
• Unix port listing moved away from udev which was not available on all platforms, to whitelisting ttyS ttyACM ttyUSB ttyAMA devices, see #610