Changes to base(2)

Changes to base:
commit 1fbfbf8fcbdb2ea218585cb4db3953b4fdbcbfbb
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Fri Nov 1 10:14:04 2013 +0100

    Export abstract `Text.Read.Lex.Number` type

    This fixes some "could not find link destinations" Haddock warnings and seems to
    the "right thing to do". The since-annotation for `Number` is changed as the `Number`
    has becomes referencable in user code only w/ 4.7.0.0 even though it existed already
    in 4.6.0.0.

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

commit cad7219d7a149c8bb3e8eeb0467c437f59715506
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Fri Nov 1 10:07:44 2013 +0100

    Add a couple of `/Since: 4.7.0.0/` annotations

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>