Setup for 6x10 board, with standard set of 12 pentominoes.

Adjusted symmetry as required (i.e. Piece named "lambda", has additional image, rotated by 90 degrees).
Note: This finds the 2339 known solutions in about 1 minute on MacBook Pro Retina 2.7GHz core i7.
Added git ignore (lazy: my setup just has qb64 in same dir as code).