update package structure, move non-executables to lib

lib/alfred.py

@@ -0,0 +1,20 @@
+import subprocess
+import json
+
+
+def _fetch(data_type):
+    output = subprocess.check_output(
+        ["alfred-json", "-z", "-f", "json", "-r", str(data_type)])
+    return json.loads(output.decode("utf-8")).values()
+
+
+def nodeinfo():
+    return _fetch(158)
+
+
+def statistics():
+    return _fetch(159)
+
+
+def vis():
+    return _fetch(160)