Simplify migrations and redesign utility scripts.

util/manage.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+
+import sys
+from common import error, run_help
+from migrate import run_migrate
+from test import run_test
+
+if __name__=='__main__':
+
+    if len(sys.argv) < 2:
+        error("Usage: './manage.py <command> [options]'")
+
+    name = sys.argv[1]
+    args = sys.argv[1:]
+
+    if name == "test":
+        run_test(args)
+    elif name == "migrate":
+        run_migrate(args)
+    elif name == "help":
+        run_help()
+    else:
+        error("Not a command")