this adds 'kqueue' to the list of supported backends on Mac OS X
Also, redirect configure's output to a file.

- this can be overriden by passing update=True to start() method
- again() method is updated as well
- see issue 97: code.google.com/p/gevent/issues/detail?id=97

replace __nonzero__ with __bool__ on py3. replace bound-method check
in getfuncname.

it doesn't work with python 3

Six (http://pypi.python.org/pypi/six/) is a Python 2 and 3
compatibility library.

* Rename core_.pyx to core.ppyx and use C preprocessor macros here instead of m4 macros

--HG--
rename : gevent/core_.pyx => gevent/core.ppyx

gevent is now using libev and requires at least python 2.5.

run configure in build_temp instead and copy the pregenerated
ares_build.h.dist to build_temp on windows.

Run configure with /bin/sh instead of changing permissions.

some systems come with an outdated unifdef command that doesn't
understand the "-b" option. We now check that beforehand and call
unifdef without the -b option.

fixes "python2.7 array.array doesn't support memoryview used in
gevent.socket.send" issue
(http://code.google.com/p/gevent/issues/detail?id=94)

this makes test__select.py compatible with py.test and makes it
possible to run test__select.py with stdin redirected.

py.test wanted to run the test_get_interrupt and test_put_interrupt
functions, so rename then.

array fails, see http://code.google.com/p/gevent/issues/detail?id=94

we do this by using a custom sdist class. it's also called sdist as
the classname is also used for the warning message about the missing
README.txt and I didn't want to change that.

this forces make to choose the same python executable that is running
setup.py.  if PYTHON is already set, don't overwrite it.