Delete superseded ga.ctb
Add ga-g1.utb, ga-g2.ctb as provided by Ronan McGuirk
Add manually checked ga-g1 and ga-g2 harness tests

ga-g1: 10 tests.
ga-g2: an Irish poem (69 tests).
tables/ga-g1.utb: replace \xhhhh by the unicode character it represents
update news
Merge branch 'rmcguirk_irish'

* rmcguirk_irish:
  Update news
  tables/ga-g1.utb: replace \xhhhh by the unicode character it represents
  Add manually checked ga-g1 and ga-g2 harness tests
  Add ga-g1.utb, ga-g2.ctb as provided by Ronan McGuirk
  Delete superseded ga.ctb