added in tram colours - need to work out coach and metro
added in tram colours - need to work out coach and metro

Signed-off-by: Josh Angell <87c19ed4203f58822db84cc03bb830e941ff134c@gmail.com>

mysociety/fixmytransport,mysociety/fixmytransport,mysociety/fixmytransport,mysociety/fixmytransport,mysociety/fixmytransport,mysociety/fixmytransport