mistake. ( It may come in for sure tough)

(http://bugs.python.org/issue2882)

(http://bugs.python.org/issue2882)

GB18030 extension in encoding. (bug reported by Bjorn Stabell)

(reviewed by Walter Dörwald)

This enables even impatient people to run tests that require remote
files such as test_normalization and test_codecmaps_*.

and installed layouts to make maintenance simple and easy.  And it
also adds four new codecs; big5hkscs, euc-jis-2004, shift-jis-2004
and iso2022-jp-2004.

This is similar to test_normalization, so that many source trees
can reference the same test file(s).

Several style fixes are suggested by Martin v. Loewis and
Marc-Andre Lemburg. Thanks!