Fixed I2C2 initialization
Make the version-scripts git-aware

Some people prefer to use git (easy possible by using git-hg) therefor
make the version-scripts git-aware.

To not change the view of the version string(s), the version when using
git still looks the same as if mercury is used (and not like a
standard git-version).
Fixed make cload by updating references to crazyflie-clients-python
Fixed version template to work with more than 1 git branch
Added LOG API to read variable from within the coper
Added experimental brushless driver
Added fast charging capability for wall adapters
eskylink: fix cut'n'paste error

It looks like "pitch" was meant to be tested after extracting the pitch,
rather than "roll" which is uninitialized at that point.
Merge pull request #22 from jsgf/master

eskylink: fix cut'n'paste error