Rakudo compiler releases

Borrowed process from Parrot

Monthly release process

Each release has a "release manager"

Ideally more than one

Rakudo releases #0 through #13 were in Parrot repository:

2007-12-18 2008-01-15 2008-02-20 2008-03-18
2008-04-15 2008-05-20 2008-06-17 2008-07-15
2008-08-19 2008-09-16 2008-10-21 2008-11-18
2008-12-16 2009-01-20