Add mediagoblin._compat module.

diff --git a/mediagoblin/_compat.py b/mediagoblin/_compat.py
new file mode 100644 (file)
index 0000000..bbd91c3
--- /dev/null
+++ b/mediagoblin/_compat.py
@@ -0,0 +1,3 @@
+import sys
+
+PY3 = sys.version_info[0] >= 3