Phase one of new privacy: remove the old stuff.
Phase two of new privacy: implement the new stuff.
Oops, that's supposed to be a break.
Added an hfield method to croc.ex_library.CreateClass.
Derp, forgot to add the actual rules for and/or/not
Oooops, forgot that case in the compiler
Phase three of new privacy: update code to use it. Closes #92.