Readme: `make test` requires `make`
Readme: `make test` requires `make`

References:
- https://github.com/Project-OSRM/node-osrm/issues/207
- https://github.com/Project-OSRM/node-osrm/issues/207#issuecomment-230515796

oxidase/node-osrm,KnockSoftware/node-osrm,Project-OSRM/node-osrm,oxidase/node-osrm,oxidase/node-osrm,KnockSoftware/node-osrm,Project-OSRM/node-osrm,KnockSoftware/node-osrm,Project-OSRM/node-osrm,KnockSoftware/node-osrm