xcode is based on llvm-gcc, which btw is deprecated. The compilation
of libev bails out with:

,----
| libev/ev.c:885:3: error: #error "memory fences not defined for your architecture, please report"
`----

We work around it by undefining __llvm__ which makes ev.c trust
gcc-llvm's advertised gcc version.

See http://lists.schmorp.de/pipermail/libev/2011q4/001618.html for a
discussion of the issues involved.

to be used when passing events integer as first argument is desirable
the old method of passing EVENTS object as first argument is still
used internally but no longer advised or advertised

--HG--
rename : greentest/test_hub_shutdown.py => greentest/test_hub_join.py

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