WIP mne kit2fiff

Very much still WIP.

Hi everyone,

I have been working on a python implementation of the mne_kit2fiff for the KIT MEG system. I have completed a large portion of it but I may need some help with a few tweaks and final steps: 
-channel coil transformation
-channel unit vectors of coord_frame.
-fix dev_head_t
-creating a synthetic trigger channel

Feedback is welcome.