AreaDetector stub
Signal properties on AD classes (except overlay)
And properties now work (added missing example)
MNT: cleanup areadetector example
MNT: merging session manager changes
ENH: areadetector signal groups, missing RBV-only values
ENH: basic AD plot example
ENH: plugins under AreaDetector instance
Ignore vi/vim backup files.
MNT: cosmetic changes.
ENH: begin to flesh out RunEngine.
ENH: temporarily add report method.


Fix (remove) this hack as soon as no longer needed.
ENH: mockup databroker calls.


These are commented out for now.
MNT: fix missing detector trigger section.
ENH: add testing config for 23id1 and rudimentary scan impl.
ENH: SignalGroups now have value/readback - used in AreaDetector
ENH: timestamps, pv names on group
MNT: missing transform in ad and a few signals
MNT: cleanup ad example a bit
MNT: add convenience methods for interfacing with Data Broker.