Gcs version

Fixes #1288 
```
Traceback (most recent call last):
  File "/Users/Cotton/Programming/TauLabs/ground/gcs/../../make/scripts/version-info.py", line 460, in <module>
    sys.exit(main())
  File "/Users/Cotton/Programming/TauLabs/ground/gcs/../../make/scripts/version-info.py", line 416, in main
    xkcd = download_xkcd_json()
  File "/Users/Cotton/Programming/TauLabs/ground/gcs/../../make/scripts/version-info.py", line 324, in download_xkcd_json
    except (requests.exceptions.ConnectionError, ValueError):
NameError: global name 'requests' is not defined
```