Early commit for issue #1135

Add support migrating single imports from the flask.ext style to flask_

scripts/temp.py

@@ -0,0 +1,19 @@
+from flask_foo import bam
+import flask_foo as foo
+
+def migrate(old_file):
+    new_file = open("temp.py", "w")
+    for line in old_file:
+        if line[0, 15] is "from flask.ext":
+            if line[15] == '.':
+                import_statement = line[16::].split(' ')
+                extension = import_statement[0]
+                line = line. replace("flask.ext." + extension,
+                                     "flask_" + extension)
+            else:
+                pass
+
+        new_file.write(line)
+
+if __name__ == "__main__":
+    old_file = open(sys.arv[1])