And added unit test for it.

Fixed a bug about MomentumTransfer in ConvertCWPDMDToSpectra.

Use Degrees for output workspace if target unit is 2theta for
ConvertCWPDMDToSpectra.

Refs #5977

This gives the utf-8 symbols for the X-axis units.
Refs #9252

Refs #9252

Refs #9252

Refs #9252

Refs #9252

Refs #9252

This allows the unit to return a wide string containing unicode character
encodings, giving more flexibility in how units are presented.
Refs #9252

I am unsure about it, as the functional equivalent of this function for ConvertToMD methods would return more then 2 values. And some functional modifications of this method may also return more then 2 values. But after some thinking decide to make the change for the time being and then see if expansion is necessary.

refs #7529 further enhancements (not finished)

but more testing is necessary
refs #8794 Resolved conflicts while reverting ticket to master

Conflicts:
	Code/Mantid/Framework/MDAlgorithms/inc/MantidMDAlgorithms/ConvertToMDHelper2.h
	Code/Mantid/Framework/MDAlgorithms/src/ConvertToMD.cpp
	Code/Mantid/Framework/MDAlgorithms/src/ConvertToMDHelper2.cpp

Refs #7742

Refs #7742

(1) Add unit second for events used in algorithm CountEventsInPuleses
(2) Make CountEventsInPulses event only in output
(3) Fix the issue with sum spectrum.
(4) Output X-axis unit will be fixed at second.

The static quick conversion map mutated within a parallel loop, see
AnvredCorrection, so it needs to be protected by a critical block

Work fine and correctly.
Cycling the discrepancy in algorithm conversion

Trivial fix (piece of code commented)

and hopefully tested

All internal sub-algorithms should work in momentum. Unit "Momentum" has been added but not yet finished.

Refs #3934: Refactored units to use an initialize() method and a singleToTOF() method. This was used in EventList's to directly convert TOF's without having to go through getTofs() setTofs(). This also preserves sort order.