[WIP] Initial basic medipix implementation

[MarcusZuber]

ToDo:

• Move data to pkg-data
• Proper docs (incl. description of approximations)

[coveralls]

Coverage decreased (-0.8%) to 56.329% when pulling 8397fff on medipix into b4c5c31 on master.

[MarcusZuber]

@tfarago You wanted to do some rework of the cameras, before I merge this (how the exp. time influences the counts if I remember correctly).

[tfarago]

Ah, maybe it's time to actually do it now 😉 In the meantime, you could look here to see how device-related data are handled in syris.

[MarcusZuber]

Do you have any experience how to cite the source of my data?

[tfarago]

Haha, good one! In a comment?