- Compatible with Squeak 3.7.
	- Better support for Symbols (thanks to Brent Pinkney!).
	- fix for storing Exceptions in the repository (to accommodate changes in
Squeak 3.6).
	- New Date index type for MagmaCollections.
	- New Float index type for MagmaCollections.
	- MagmaSessions cleaned from MethodContext receivers, allowing full garbage
collection (thanks to Giovanni!).
	- Critical bugs related to adding too many duplicate-keyed objects to a
MagmaCollection fixed.