Updated connected model to allow multiple types of transfers. Transfer type is determined as follows:

if output is a plate: plate - plate
else input is a plate: plate - tubes
else: tube - tube

Tube - plate  isn't possible so we can assume plate - plate if the output type is a plate.

Plate is the term used in the mapper for plates racks and wells.
Minor bugfix
Merge pull request #190 from mikemases/Connected_Transfers_Update

Updated connected model to allow multiple types of transfers. Transfer t...