Design Notes for:
Support for BT7 Anaylyser Package in 
TAS Data Reduction in 
DAVE

* Must support backward compartipility with single analyser-detector datasets.
* Therefore, use a keyword to easily distiguish datasets pre- and post- new 
  analyzer package.
* Use a data structure to record all metadata relating to the new analyzer 
  package such as:
  - Operating mode
  - Diffration Detector names (DD) - 3
  - Primary/single detector names (SD) - 3
  - Door Detectors (TD) - 11
  - Position Sensitive Detector names (PSD) - 48

* If the operating mode is DD or SD, the signal should consist of the sum of 
  DD or SD detectors respectively.
* If the operating mode is SD, then a plot of the data should be accompanied 
  by an overplot of a sum or part sum of the DD detectors.


* For DD mode, a dialog should be available to enable the user decide which 
  of the 3 detectors to include in the overall intensity.

* For SD mode, a dialog should be available to enable the user decide which 
  of the 3 detectors to include in the overall intensity.
  In addition, the dialog should include an option to select the door 
  detectors to be included in the door dedector signal that is overploted
  on the SD signal.


* Have option to display intensity vs detector number for DD, SD, TD (and PSD eventually)

* For PSD mode... 

