Bump to next development release.
Update packet description.
Remove platform-specific CAN init code from generated firmware source.

In vi-firmware this has been pushed down into the internals of the
firmware, so it doesn't need to be here anymore.

See https://github.com/openxc/vi-firmware/commit/dce0249e10c664e698208d2c784972f0c55a0981
Remove old hipchat token from Travis CI config.
Document how to use in Windows without Cygwin.
Update CHANGELOG for v0.11.3 release.