High level driver for FLI camera. Uses the FLI library.
Note: a lot of code is commented out, reason is the returned objects from the USB scan
are not clearly identified (flidev_t == USB_CAMERA?). Will clarify after testing
on the real camera.
Fixed requirements broken by c81e48386a9386d0d03ccafea424bb0e35f022bb
Merge branch 'master' into FLI
Upstream master updated, pulled to local master. Hence mods merged into branch.
More methods implemented.
Exposure methods.