LoadRaw: 0th spectrum can be useful sometimes

[Martyn Gigg]

From Python training: 0th spectrum can be useful for diagnostics as it should be all zeroes and if it is not it indicates an error

[Nick Draper]

Create Two new algorithms (in the Diagnostics Category)

LoadRawSpectrum0 LoadRawBin0

[Sofia Antony]

(In [4338]) re#1031 - Created two new algorithms for loading zeroth spectrum and bin from raw file. Improved structure of Load raw algorithm,added a new base class for LoadRaw3. Changed multiple file opening/closing code in LoadRaw3 and Roman has agreed to test this on customer machine. If this creates any issues LoadRaw3/Loadlog code will be changed to handle the issues.

[Sofia Antony]

(In [4339]) re#1031 - fix for Linux build failure, doxygen warnings fixed,added unit testing files for loadrawspectrum0 and laodrawbin0 which I missed out in last check in.

[Sofia Antony]

(In [4444]) re #1031 X values for bin zero is initialised to zero and added a new method loadSpectra to LoadRawHelper class .By mistake I checked in LoadRawHelper.cpp in last check-in .so submitting the header file with this check-in.

[Sofia Antony]

(In [4813]) re #1031 fixed some of the issues in loading spectrum 0,bin 0. also submitting the DataHandling unit tests which I changed for removing the workspaces at the end of execution from ads .

[Stuart Campbell]

This ticket has been transferred to github issue ​1879