Flow-24 allow reuse of connections within Bricks
- adds an abstract base class "BrickBase" to build a "Brick" in modules
- adds a LegacyBrick to wrap the old
do_brick_processing
-way - adds a Brick-class specific to the BrickRunner to handle those module-Bricks
- moves Packet from classes.py to Brick_Runner/packet.py
- moves DictConvertable from classes.py into utils.py
- removes classes (now empty)