changes for areaDetector 2.6

[prjemian]

• sscan R2-10-2

• areaDetector R2-6

• ADCore R2-6

• ADSupport R1-1

• ADSimDetector R2-2

• asyn R4-31

• seq 2-2-4

• also defines SUPPORT using the directory installed with this script

• changes AREADETECTOR to AREA_DETECTOR as used in areaDetector module

[prjemian]

will be superceded by #6 when that is merged, close this with that acceptance

[keenanlang]

Superseded by #6