Merge pull request #17 from rburchell/master

Fixups.
bump version to 0.7.3.20
remove mce from Requires

bump version to 0.7.3.21
fix hybris gyroscope.
Merge pull request #18 from lpotter/master

remove mce from Requires
Re-disable mce from sensorfw.

This is causing problems with mce <-> sensorfw handling, and it's rather risky
to mess around with this for now. Revisit at a later time.