Merge remote-tracking branch 'nikomatsakis/crateification' into oibit2

Conflicts:
	src/librustc/middle/expr_use_visitor.rs
	src/librustc/middle/ty.rs
	src/librustc_driver/driver.rs
	src/librustc_typeck/check/vtable.rs
	src/librustc_typeck/coherence/mod.rs
	src/librustc_typeck/lib.rs