Top rfcs issues

Move test::black_box to std and stabilize it

T-libs

More flexible coherence rules that permit overlap

T-lang

Add a mutation modifier for in place mutations

Lower the restrictions on `if let`

T-lang

Add `lower_bound`, `upper_bound` and `equal_range` for slices where T: Ord to complement `binary_search`

T-libs

Disallow overwriting identifiers in the scope

T-lang

reverse iterator

T-libs

Float-free libcore (for embedded systems and kernel drivers, among other things)

T-dev-tools T-libs

Create safe LLVM bindings

T-libs

Unsafe fields

A-data-types A-syntax A-unsafe T-lang postponed