* Upgrade bzip dependency to 1.0.5

version of libffi in OSX 10.6.1.

This fixes issue6918

to the libedit emulation of the readline API on OSX 10.5 or later.

This also adds a minimal testsuite for readline to check that the
history manipuation functions have the same interface with both
C libraries.

#6944: the argument to PyArg_ParseTuple should be a tuple, otherwise a SystemError is set.  Also clean up another usage of PyArg_ParseTuple.

does now always result in NULL.

base class positional arguments.

Make the optparse doc style a bit more standard: use standard description units for attrs/methods/etc., and use the correct referencing roles.

UTF-32 stream with a non-raising error handler like "replace" or "ignore".

Note in the intro to Extending... that ctypes can be a simpler, more portable solution than custom C code.