[Python-Dev] Fix Unicode-disabled build of Python 2.7

[Serhiy Storchaka]

I submitted a number of patches which fixes currently broken 
Unicode-disabled build of Python 2.7 (built with --disable-unicode 
configure option). I suppose this was broken in 2.7 when C 
implementation of the io module was introduced.

http://bugs.python.org/issue21833 -- main patch which fixes the io 
module and adds helpers for testing.

http://bugs.python.org/issue21834 -- a lot of minor fixes for tests.

Following issues fix different modules and related tests:

http://bugs.python.org/issue21854 -- cookielib
http://bugs.python.org/issue21838 -- ctypes
http://bugs.python.org/issue21855 -- decimal
http://bugs.python.org/issue21839 -- distutils
http://bugs.python.org/issue21843 -- doctest
http://bugs.python.org/issue21851 -- gettext
http://bugs.python.org/issue21844 -- HTMLParser
http://bugs.python.org/issue21850 -- httplib and SimpleHTTPServer
http://bugs.python.org/issue21842 -- IDLE
http://bugs.python.org/issue21853 -- inspect
http://bugs.python.org/issue21848 -- logging
http://bugs.python.org/issue21849 -- multiprocessing
http://bugs.python.org/issue21852 -- optparse
http://bugs.python.org/issue21840 -- os.path
http://bugs.python.org/issue21845 -- plistlib
http://bugs.python.org/issue21836 -- sqlite3
http://bugs.python.org/issue21837 -- tarfile
http://bugs.python.org/issue21835 -- Tkinter
http://bugs.python.org/issue21847 -- xmlrpc
http://bugs.python.org/issue21841 -- xml.sax
http://bugs.python.org/issue21846 -- zipfile

Most fixes are trivial and are only several lines of a code.