Show replacement for module deprecation

[fredrikekre]

Shows the new name for a deprecated module, like it currently does for deprecated types.

julia> module Foo
       end
Foo

julia> Base.@deprecate_binding Bar Foo

julia> Bar
WARNING: Main.Bar is deprecated, use Foo instead.
  likely near no file:0
Foo

[fredrikekre]

Could this be backported to 0.5?

[yuyichao]

I think this is a good candidate.