Transact response handling and the required unmarshaling support for UUID

Signed-off-by: Madhu Venugopal <madhu@socketplane.io>
Adding Delete Transaction tests and it also acts as a proper cleanup for the insert Bridge test

Signed-off-by: Madhu Venugopal <madhu@socketplane.io>
Moving set, map and uuid to its own Go files.

OVS specific marshalling, unmarshalling and other specific processing for Set, Map and UUID clutters
notation.go much and hence moving these to their own self-contained files

Signed-off-by: Madhu Venugopal <madhu@socketplane.io>
Merge pull request #23 from mavenugo/response

Response handling, Delete Transaction Tests and some code re-org