Small fixes in mobiule station slave.
Filters out keepalive packets from sending to the mobile station.
Adds mobile station client to the panda CS main.
Adds an interface to the train database.
Adds a conversion layer for interpreting mobile station CAN packets and forwarding them to the NMRAnet train nodes.
Adds traindb implementation based on the const_traindb structure.
Fixes build of mobile station slave.
Adds unit test for translation of set speed and fn commands.