refs #6841 added test for experiment info
refs #6841 not it is full test for EI
refs #6841 typo fixed
refs #6841 now try to restore EI deleted earlier.
refs #6449 correct EI copying
refs #6841 ok -- this is the consequences of fixing on develop

The branch itself should be clean.

Merge branch 'feature/6841_MergeMDAddsExperimentInfo' of https://github.com/mantidproject/mantid into develop

Conflicts:
	Code/Mantid/Framework/MDAlgorithms/src/MergeMD.cpp
Merge branch 'develop' of https://github.com/mantidproject/mantid into develop