fix travis build invocation
fix travis build invocation

this branch failed CI because the targets were being invoked
out-of-order. the integration test relies on the binary. also, the
'test' target was updated to include the integration tests so this is a
little simpler now.

keyurdg/driveshaft,adsr/driveshaft,adsr/driveshaft,keyurdg/driveshaft,keyurdg/driveshaft,keyurdg/driveshaft,adsr/driveshaft,adsr/driveshaft