support more compact RUBIN

One of the few places listing RUBIN coordinates today,
http://ormbunkar.se/koordinater/, lists a more compact
form in their examples, compared to the 1980s examples
I've followed so far: the two leftmost groups are
joined, with no spacing:

  7D 9e 379 035
  7D9e 379 035

Support is added for this too.
license and README

Added the BSD licence blurb, and also the README which
Github likes so much.