added most recent version of ext_proc
 added a test which demonstrates the function of expand_args

Conflicts:
	test_envoy.py
 re-enabled disabled tests

Conflicts:
	test_envoy.py
 can now implement run, at least for the basic testcase in terms of extproc

Conflicts:
	envoy/core.py
	test_envoy.py
 found another disabled test, bad paddy

Conflicts:
	envoy/core.py
 now input can be handled by run_extproc
 tests that assert timeout behaves properly with run_extproc

Conflicts:
	envoy/core.py
	test_envoy.py
 test_quoted_args works for run_extproc
 minimally functioning connect_extproc implementation, not fully tested

Conflicts:
	envoy/core.py
	test_envoy.py
 connext_extproc now works with commands that eventually return data

Conflicts:
	envoy/core.py
	test_envoy.py
 removed unused code, added tests that assure timeout is actually working

Conflicts:
	envoy/core.py
	test_envoy.py