Merge branch 'release/1.5.0' into develop
Replace Ruby based underscores with __unused tags like BETURLSession.
Add SH_objectAfterObject: and SH_objectBeforeObject: on ordered enumerations classes
Add to readme.
Bump to 1.6.0
Move the declarations to SHFastEnumerationOrdered
Merge branch 'release/1.6.0'
bump to 1.6.1
Merge branch 'release/1.6.1'