tests: patcher_test: let Popen search for `true` in PATH

As Edward George reported in https://github.com/eventlet/eventlet/pull/3
There is no /bin/true on Darwin, it is in /usr/bin/true instead.
So we use the fact that Popen() calls execvp(3) which searches for file in PATH.
0.10 release (branding)
Bump version to 0.11.0.dev
use a tuple of URLs that do not 404
examples: webcrawler: urls tuple->list + more style fixes
doc: fix 0.10 release PyPi tarball link
build-website script for easy update of eventlet.net and online documentation (on Github pages)
doc: hubs: update link to common.txt (note on internal API functions)
tests: skip_if_no_ssl decorator always returned None
tests: check_idle_cpu_usage measures getrusage() around sleep(); throws AssertionError
tests: LimitedTestCase.set_alarm() detects busy loops like while True: pass
tests: ssl: socket.sendall() busy loop when client is reading slowly

https://bitbucket.org/which_linden/eventlet/issue/134
ssl: socket.sendall(): trampoline if sent 0 bytes; fixes CPU burn

https://bitbucket.org/which_linden/eventlet/issue/134/greenssl-performance-issues
zmq: Socket.close() support linger argument; Thanks to Eric Windisch

https://github.com/eventlet/eventlet/issues/9
Regression. Worked in 0.9.16 because .close() method was not overriden.
0.11 bug fix release (branding)
Bump version to 0.12.0.dev