Generational counting

This crate implements Vale's generational reference counting memory management. Intended as an alternative to Rc with slightly different semantics.

Advantages over Rc:

• Sharing references are Copy and therefore extremely cheap
• RAII semantics

Disadvantages:

• Only one owned reference, requiring management
• Dereferencing returns Option
• Not Deref

The locking system is non-granular for ease of implementation (and possibly speed.)

Generational reference counting in Rust

An implementation of Vale's generational reference counting memory management model.