DMD 0.151 release

[Walter Bright]

Sean Kelly wrote:

> phobos/std/typeinfo/ti_aA.d:
>     "uint getHash" -> should be "hash_t getHash"

Hmm. That's already the case?

> phobos/object.d:
>     "alias uint hash_t" -> should be "alias size_t hash_t" or needs a 
> version(X86_64) block as in phobos/internal/object.d

Done.