Re #6709 several algorithms changed to new format
Re #6709 load algotithm added as a no sig section
Re #6709 the rest of the algorithms
refs #6709. Adapt wiki_maker for usages.
refs #6709. Merge branch 'master' into feature/6709_custom_usage

Conflicts:
	Code/Mantid/Build/wiki_maker.py
	Code/Mantid/Framework/Algorithms/src/Rebunch.cpp
refs #6709. Merge functionality.

Works for both Debug and release builds. The usage section is also what was specified.
Merge remote-tracking branch 'origin/feature/6709_custom_usage'