No LICENSE information

[ukaea-chah]

There is no LICENSE file to inform the user of terms of use. Most likely overlooked when splitting out as a submodule.

Moreover, even the parent areaDetector LICENSE file has no information about the (propietary? closed-source?) atmcd{32,64}m/shamrockcif/libandor library files in andorSupport

[MarkRivers]

I will add this when I get a chance.