Fix up clean target to use go clean -i.
Fix up clean target to use go clean -i.

Use go get to ensure that go-openzwave is available locally, then make it.

Signed-off-by: Jon Seymour <44f878afe53efc66b76772bd845eb65944ed8232@ninjablocks.com>

ninjasphere/driver-go-zwave,ninjasphere/driver-go-zwave