v1.1.0 - Integration with Rust

This is a minor increment on the previous release with the following additions:

• Ability to initialize the heap explicitly by passing a pointer and size with umm_init_heap() - the old umm_init() uses the linker supplied values to call umm_init_heap()
• Ability to handle an uninitialized heap by either forcing initialization or hanging
• Ability to more explicitly control #defines that affect the operation of the library