Merge remote-tracking branch 'origin/feature/8642_header_work'
Merge remote-tracking branch 'origin/feature/8635_kernel_strings'
Modified wiki and some comments. Refs #8250.
Cleaned the code. Refs #8250.
Resolved conflict. Refs #8250.

Conflicts:
	Code/Mantid/Framework/Algorithms/src/ExtractMaskToTable.cpp