fix issues for pip install -r

[tom-aa]

Greetings, this is tom.

I found an issues when install supervisor-quick and supervisor in one requirements.txt, could you help to review? thanks

tom:~ tom$ cat requirements.txt
supervisor==3.0a12
supervisor-quick==0.1.4

tom:~ tom$ sudo pip install -r requirements.txt
Collecting supervisor==3.0a12 (from -r requirements.txt (line 1))
Downloading supervisor-3.0a12.tar.gz (438kB)
100% |████████████████████████████████| 440kB 493kB/s
Collecting supervisor-quick==0.1.4 (from -r requirements.txt (line 2))
Downloading supervisor-quick-0.1.4.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "", line 1, in
File "/private/tmp/pip-build-KYbVfm/supervisor-quick/setup.py", line 8, in
version=import("supervisor_quick").version,
File "/private/tmp/pip-build-KYbVfm/supervisor-quick/supervisor_quick.py", line 10, in
from supervisor.supervisorctl import ControllerPluginBase
ImportError: No module named supervisor.supervisorctl

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /private/tmp/pip-build-KYbVfm/supervisor-quick/