npm test redefined to run grunt test
npm test redefined to run grunt test

updated package.json to allow travisCI execute grunt test task.
peterkacinec/engine,tomatell/engine,peterkacinec/engine,tomatell/engine,peterkacinec/registries,peterkacinec/registries,tomatell/engine,sosik/registries,sosik/registries,MaxKarel/engine,MaxKarel/engine,MaxKarel/engine,sosik/registries,peterkacinec/engine,peterkacinec/registries