Per feature req #1445 - extended the REST API for routing requests

... to include ability to set all key weighting parameters. Extra params that can
now be set are:
 * waitReluctance
 * waitAtBeginningFactor
 * walkBoardCost
 * bikeBoardCost

Currently this is just changed against 0.10.x branch. Likely relevant to 0.11.x release and master too.