[engine] Add initial version of event loop engine

Re-add the engine that is responsible for tying together input, output,
etc.

see #23

bumblebee-status

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+import sys
+import bumblebee.engine
+import bumblebee.config
+
+def main():
+    config = bumblebee.config.Config(sys.argv[1:])
+    engine = bumblebee.engine.Engine(
+        config=config
+    )
+
+    engine.run()
+
+if __name__ == "__main__":
+    main()
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4