Muon grouping changes

[Nick Draper]

Load MuonNexus:

• Allow group numbers > 2, just create a new group for each one.
• spectra with group no 0 just leave alone
• Output to the log at INFO the groups and the contents of the group.

   group 1 = 1,2,3,5
   group 2 = 4,7,8,9
  

MuonAysmmetryCalc:

• Allow the forward and backward spectra properties to accept arrays of numbers.
• If an array is provided group those detectors first.

PlotAssymetrybyLogValue:

• add forward and backward spectra properties to accept arrays of numbers (default to 0 and 1)
• If an array is provided in F&B then load files with autogroup off, and feed the grouping to MuonAsymmetrycalc or do it yourelf.

[Roman Tolchenov]

(In [3284]) Changed LoadMuonNexus to allow autogrouping into more than two groups. re #958

[Roman Tolchenov]

(In [3285]) ArrayProperty for int can interpret intervals as well as individual numbers, e.g. "1-5,10,12" is a valid input. re #958

[Roman Tolchenov]

(In [3286]) Try to fix linux builds. re #958

[Roman Tolchenov]

(In [3287]) Another try. re #958

[Roman Tolchenov]

(In [3288]) Didn't work. re #958

[Roman Tolchenov]

(In [3292]) Added ForwardSpectra and BackwardSpectra to PlotAsymmetryByLogValue re #958

[Russell Taylor]

Tested OK by Martyn (tested all 3 affected algorithms).

[Stuart Campbell]

This ticket has been transferred to github issue ​1806