Remove MbtMessageClient

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Change MbtMessageParser from class to object

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Remove 'util-logging' dependency

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Merge pull request #137 from jvirtanen/cleanups/mbt-quoteapi

Clean up MBT Quote API