Allegro 4.2.0

Allegro 4.2.0 final was released this week. Being one of the developers, I feel quite proud This was the last release of the legacy codebase, and we now have lots of work ahead getting out 4.3. Quite some of the advanced new API is already implemented, but some big chunks also are still missing, and all the little details and rough edges need to be taken care of. Just the job for the Allefant.