more work on compose_RAVEN; added test files
@jean-gregoire.ducoin @min-a.cho In addition to code changes, I've added some test files: a coincidence_far.json, an event.json for a mock GRB event 'E1234', and a (currently blank) skymap file.
@jean-gregoire.ducoin @min-a.cho In addition to code changes, I've added some test files: a coincidence_far.json, an event.json for a mock GRB event 'E1234', and a (currently blank) skymap file.