Harmonise Mantidplot and qtiplot plotting commands

[Nick Draper]

There are some areas where we do not fit with the qitplot way of soing things around plotting data. and these could be simply fixed.

1. Add a workspace command similar to the qtiplot table or matrix command. it should just link to

   mtd["ws"]
   

2. Add the ability to specify the plot type to PlotSpectrum and PlotBin, using the Layers object.
3. Adjust the plotSpectrum and plotBin commands to allow tuples as well as python lists (& alther the documentation to use tuples primarily).
4. Intercept the qtiplot plot command to allow workspaces to be used as a source and then forward the call to PlotSpectrum.

Refs:

1. QTIplot Handbook ​http://soft.proindependent.com/doc/manual-en/x6300.html#Python-Plots2D
2. Mantidplot help http://www.mantidproject.org/MantidPlot:_1D_Plots_in_Python#Layers

[Nick Draper]

Bulk move of tickets at the end of iteration 28

[Nick Draper]

"New" tickets moved at the code freeze of iteration 29

[Nick Draper]

Bulk move of tickets to iteration 31 at the iteration 30 code freeze

[Russell Taylor]

Add workspace(name) command to MantidPlot python api. Re #2653 (point 1).

Changeset: dbbc1e3e1fe28e245f74a9dd2b8f1a6ea4860275

[Russell Taylor]

Add workspace(name) command to MantidPlot python api. Re #2653 (point 1).

Changeset: dbbc1e3e1fe28e245f74a9dd2b8f1a6ea4860275

[Russell Taylor]

Add the ability to specify the plot type from the 'plotSpectrum' command.

This refs #2653 (point 2a). The syntax is now: plotSpectrum(workspace,indices,errors,style), where style is a new optional argument that takes the same enumerations as the 'plot' command (see http://www.mantidproject.org/MantidPlot:_1D_Plots_in_Python#Plotting_from_a_Table), though note that only Layer.Line, Layer.Scatter, Layer.LineSymbols & Layer.VerticalSteps are supported (at present) for 'Mantid' curves. Note that there's also an issue with the symbol always being the same (see #4132).

Changeset: 630d606ed174f0e45bd2460939d6000ec18ee693

[Russell Taylor]

Enhance qtiplot's 'plot' command to take a workspace + list of spectra.

This refs #2653 (point 4). If a workspace(proxy) is passed to the command it is forwarded to plotSpectrum. Otherwise, it is passed through to the qtiplot commands as before.

Changeset: c4a59c31bea8637efd4861ac694a0ad132e6420a

[Russell Taylor]

Add the ability to specify the plot type from the 'plotBin' command.

This refs #2653 (point 2b). All types work - you can even make pie charts of a bin now! The plotBins command could really use tidying up though - it's very clunky.

Changeset: 2f568d6ceea09df8373cbdbf379cb48164c946e5

[Russell Taylor]

Accept tuples as well as lists in the plotSpectrum & plotBin commands.

This refs #2653 (point 3).

Changeset: ff49239a681eb5315209f956ca072048e0dc7d6e

[Janik Zikovsky]

All 4 points confirmed. See also #4470.

[Stuart Campbell]

This ticket has been transferred to github issue ​3500