added missing svn python module

git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@11 8a3a26a2-13c4-0310-b231-cf6edde360e5

svn.py

@@ -0,0 +1,14 @@
+import os
+import sys
+
+def getRevision(path):
+  cmd = os.popen("svn info " + path)
+
+  while True:
+    line = cmd.readline()
+    if line == "":
+      raise Exception("failed to obtain revision number")
+    if line.startswith("Revision: "):
+      revision = int(line[10:])
+      return revision
+