Change parsing format to use AST via RedBaron

Moved away from using manual parsing. Source is parsed using RedBaron to make the FST. Some import formats not yet implemented, and still some bugs to work out. However, the current script works well for the two cases in the file comments.

scripts/test.py

@@ -1,6 +1,18 @@
-from flask.ext.foo import bam
+from flask.ext.foo import \
+    bam, \
+    crackle
+
 from flask.ext import foo
 
+from flask.ext.foo import (bam,
+                           a,
+                           b
+)
+
+
+from flask.ext import foo
+
+import sys
 
 def migrate(old_file):
     new_file = open("temp.py", "w")
@@ -16,5 +28,6 @@ def migrate(old_file):
 
         new_file.write(line)
 
+
 if __name__ == "__main__":
-    old_file = open(sys.arv[1])
+    old_file = open(sys.arv[1])