Games::AlphaBeta - 0.4.7

• Build/install using straight Module::Build. [#49365]
• Fix bug in Othello demo. [#49367]
• Add .gitignore and MANIFEST.SKIP

Games::AlphaBeta - 0.4.6:

• bumped version number because Module::Build's dist_name & dist_version is broken :(
• added Games::Sequential::Position to MANIFEST
• added test for bin/othello-demo (and thus for Games::AlphaBeta::Reversi)

Games::Sequential & Games::AlphaBeta - 0.4.2:

• bumped version numbers
• improve documentation a bit
• move othello.pl from examples to be installed program and renamed to othello-demo
• merged dists for convenience
• fix "use base" lines
• use M::B::Kwalitee for building