Lab 10 - Puppy REST

• Create directory 10_rest/USERNAME containing a copy of upstream master 09_json/USERNAME
• Add file pkg/puppy/rest.go implementing:

GET    /api/puppy/{id}
POST   /api/puppy/          Payload: Puppy JSON without ID
PUT    /api/puppy/{id}      Payload: Puppy JSON without ID
DELETE /api/puppy/{id}

• Use net/http/httptest for testing
• Add flag -p PORT with long flag --port PORT to command line flags
• Add flag -s STORE with long flag --store STORE with accepted values:

map, sync, db

Document the API in README.md