Alien-PIP: sort versions newest to oldest

fixing gobolinux#55

Author: sage-etcher

bin/Alien-PIP

@@ -33,7 +33,8 @@ def available_versions(prog):
      url = "https://pypi.python.org/pypi/%s/json" %prog
      data = json.load(urlopen(Request(url)))
      versions = list(data["releases"].keys())
-     versions.sort(key=parse_version)
+     # sort available versions newest to oldest
+     versions.sort(key=parse_version, reverse=True)
      return versions
    except:
      return ''