sandboxgamemaker.py: Change the download URL

The website changed the URL of the download page.
Unfortunately, we still have to parse the text to
guess the upstream version. The download links itself
just contain increasing numbers.

sandboxgamemaker.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 import urllib2
 import re
-h=urllib2.urlopen("http://www.sandboxgamemaker.com/free-game-maker-downloads").read()
+h=urllib2.urlopen("http://www.sandboxgamemaker.com/free-game-maker-download/").read()
 f=re.compile("Platinum Arts Sandbox Free 3D Game Maker (?P<version>[\d\.]+)")
 m=f.finditer(h)
 for x in m: