update Obsolete

-enable injection of editorbrowsable
-improve doco a bit
-bump Fody
-remove existing editorbrowsable attributes
Merge branch 'hideObsolete' of https://github.com/SimonCropp/NServiceBus into develop

Conflicts:
	src/NServiceBus.Core/FodyWeavers.xml
	src/NServiceBus.Core/packages.config