Squashed 'src/machinetalk/proto/' changes from 1d0d06c..0327286

0327286 machinetalk-protobuf: added time units field, changed naming of velocity and acceleration fields

git-subtree-dir: src/machinetalk/proto
git-subtree-split: 03272861da9b74afb40ee33ef9ad2870d592a9cb
Merge commit '4d765231b4447c59316a9dfb3b37e89d3c6c2a97' into mkwrapper