Algorithm to Covert Spectra number to ?

[Nick Draper]

1. Think of a name for this algorithm
2. Allow the user to specify what they want to convert the spectra no axis to
   1. 2theta
   2. r(L2)
   3. theta
   4. phi
   5. Ltotal(L1+L2)

At the end of this we should be able to plot a colour map of theta vs wavelength (important for reflectometers)

Second possible step: allow rebinning of the derived new axis

[Nick Draper]

Moved as part of iteration 18 end

[Russell Taylor]

(In [3058]) Add an algorithm, ConvertSpectrumAxis, to change the spectrum axis (the one up the side in MantidPlot) to something else. Currently, the something else can be anything you like, so long as it's Theta (of the detector relating to that spectrum). Re #753

[Russell Taylor]

(In [3059]) Fix doxygen warning. Re #753.

[Russell Taylor]

(In [3060]) Turns out that they want things in degrees rather than radians. Re #753.

[Nick Draper]

Moved as part of the end of Iteration 19

[Russell Taylor]

(In [3596]) The reflectometers prefer twoTheta here rather than twoTheta/2. Re #753.

[Russell Taylor]

(In [3597]) Remove old ReflectometerCors.py - current one in is Large Scale Structures/ReflectometerCors.py. Re #753.