Refactor the plugin registry

jedi/plugins/registry.py

@@ -0,0 +1,10 @@
+"""
+This is not a plugin, this is just the place were plugins are registered.
+"""
+
+from jedi.plugins import stdlib
+from jedi.plugins import flask
+from jedi.plugins import plugin_manager
+
+
+plugin_manager.register(stdlib, flask)