Change Lime specific MessageFactory into object

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Change MB Trading specific MessageFactory into object

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Change NASDAQ OMX specific MessageFactory into object

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Merge pull request #141 from jvirtanen/features/message-factory-object

Change MessageFactory into an object