Add common commands to matrix workspaces in Python

[NickDraper]

This issue was originally TRAC 2651

This could be implemented in:

1. PythonAPI\src\workspaceproxies.cpp
2. PythonAPI\MantidFramework.py

I suppose implementing it in C++ and exposing it is the best way.

The following options are uncontraversial (although only work on matrix workspaces):

1. Clone
2. Transpose
3. Rebin (possibly also RebinToWorkspace, rebunch and regroup)
4. ConvertUnits
5. Crop
6. Save (SaveNexus)
7. Rename

These might be worth while:

1. Mask.Extract (ExtractMasking)
2. Mask.ApplyWS (Maskdetectors using a MaskedWorkspace)
3. Mask.Apply (Maskdetectors specified detectors or spectra)
4. Mask.ApplyBins (Maskbins)
5. Integrate
6. Sum (SumSpectra)
7. Merge (MergeRuns)
8. ReplaceSpeacialValues
9. SolidAngle
10. Scale

These I'm not too sure about:

1. Load (Overwriting existing data, not the best way)
2. Delete (it would be deleting itself and therefore rensering it's own handle invalid)

These would only work within Mantidplot (Martyn set's a magic flag):

1. Display (shows the matrix)
2. Plot (1D or colour map depending on dimensionality)
3. DisplayInstrument
   We could make plot work standalone if MatplotLib was available.

The names I have suggested are just suggestions, have a think about the overall user experience.

[NickDraper]

@NickDraper (2011-04-27T07:35:26):
Bulk move of tickets at the end of iteration 28

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@NickDraper (2011-06-27T08:20:12):
"New" tickets moved at the code freeze of iteration 29

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@NickDraper (2011-09-19T09:30:01):
Bulk move of tickets to iteration 31 at the iteration 30 code freeze

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@NickDraper (2012-01-09T09:41:58):
Moved to iteration 33 at iteration 32 code freeze

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@NickDraper (2012-04-30T14:10:05):
Moved at end of release 2.1

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@NickDraper (2012-08-10T12:43:05):
Moved at the end of release 2.2

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@NickDraper (2012-10-28T11:38:20):
Moved to milestone 2.4

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@NickDraper (2013-04-29T09:49:26):
Moved to r2.6 at the end of r2.5

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@NickDraper (2013-07-26T14:01:42):
Moved to the Backlog after R2.6

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@NickDraper (2014-02-14T11:04:53):
Bulk move to assigned at the introduction of the triage step

[martyngigg]

This is very old and not something we plan to take forward.