Refs #9984 Add correlation chopper info to the Corelli IDF.
Refs #9984 Add blank CorelliCrossCorrelation alg, using class_maker.
Refs #9984 Read in WS, instrument and chopper info.
Refs #9984 Got cross-correlation doing something.
Refs #9984 Cleanup and small fixes.
Refs #9984 Fixed weights (maybe).
Refs #9984 Added parallel and progress.
Refs #9984 Added weight errors.
Refs #9984 Unit test added.
Refs #9984 Change how chopper period is determined.
Refs #9984 Add check for sorted workspace.
Refs #9984 Check bounds of tdc index.
Refs #9984 Fix check bounds of tdc index.
Refs #9984 Moved workspace validators to validateInputs.
Refs #9984 Moved more things to validateInputs and other cleanup.
Refs #9984 Add some documentation and usage example.
Refs #9984 Add t0 formula and applied it in the cross-correlation.
Refs #9984 Add usage test data. Updated unit test and usage exmaple.
Merge branch 'master' into feature/9984_corelli_cross_correlate

Conflicts:
	Code/Mantid/instrument/CORELLI_Definition.xml
	Code/Mantid/instrument/CORELLI_Parameters.xml
Refs #9984 Change stod to lexical_cast.