Contribute motion code to NaoUtil

[dnajd]

Adding a motionutil module to naoutil containing functions:

https://github.com/dnajd/FluentNao/blob/master/src/main/python/fluentnao/nao.py lines 239 - 315

[10:57:46 PM] Dave Snowdon: here's a challenge though, are there meaningful unit tests we could write to verify it's behaviour?