added hashmap_ng
added hashmap_ng export
switched libsyntax to the new hashmap
switched libgreen and libnative to hashmap_ng
switched libuuid to use hashmap_ng
switched libterm to hashmap_ng
switched backend and metadata in rustc to use hashmap_ng
switched some crate context hashmaps to hashmap_ng
switched llvm to hashmap_ng
switched rustc driver to hashmap_ng
fixed horrifying bug in pop()
one more hashmap upgrade
switched every more core hashtables to hashmap_ng, along with a bunch of tiny little tweaks
full switch to hashmap_ng