Implement RDRAND via asm!; asm! is possibly too broken for this to be usable.
Add entropy calculations to os_unix.
More documentation.
More docs
Update for master.
Remove new ctor on Rng; will replace with Default impls were appropriate.
Remove Rand for char, given upstream changes.
Convert StdRng to use Default.
Update to master.
Remove an ICE workaround fixed upstream.
Update for language changes.