Merge pull request #91 from m2-farzan/fix-psutil-dependency

Add psutil dependency

README.md

@@ -81,6 +81,10 @@ This project makes use of a number of open-source libraries which the author is
 - [simplejpeg](https://gitlab.com/jfolz/simplejpeg): Used for encoding and decoding JPEG format.
  Copyright (C) Joachim Folz
  MIT License
+
+- [psutil](https://github.com/giampaolo/psutil) - Used for monitoring system resource utilization.
+ Copyright (C) Giampaolo Rodola
+ BSD 3-clause license
 
 - [Masonry](https://masonry.desandro.com/): Used for laying out cards on the page.
  Copyright (C) David DeSandro

rosboard/subscribers/processes_subscriber.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python3
 
-import psutil
 import re
 import select
 import subprocess

setup.py

@@ -13,6 +13,9 @@
  'setuptools',
  'tornado>=4.2.1',
  ],
+ extras_require = {
+ 'system_stats': ['psutil'],
+ },
  package_data={
  'rosboard': [
  'html/*',