Added missing NSOrderedSet methods (insert, remove, replace, etc) per Issue #75 comments.
Fixed issues in previous code.

See Issue #75, comment by @batkuip "Those methods are trickier to implement because the mutable set accessor uses mutableSetValueForKey which seems to call the insertObject:atIndex internally causing it loop forever."

This code creates a temporary mutable set using the ordered set (not the mutable set which loops as noted), making sure to call appropriate KVC methods.

Credit for original code/idea goes to @Dmitry Makarenkoless and @JLust on StackOverFlow (http://stackoverflow.com/questions/7385439/exception-thrown-in-nsorderedset-generated-accessors).
Merge branch 'master' of https://github.com/JRG-Developer/mogenerator into v1.28
[TES][CHANGE] Upgrade text.xcdatamodel to the
diffable+mergeable new Xcode 4.x format.
[TEST][FIX] Avoid HumanMO.hairColor NilPointerException (heh).
[TEST] Churn. Even unordered relationships not working then way I expect them to. Created new Xcode 4.2.1 project and got it working on 10.7 and 10.9 (Xcode 6b3). Will eventually migrate over to that.