lamigra.js add collision detection for NPC !free/libre state and sombra set piece

[rafaelfajardo]

add collision detection between a Non Player Character sprite member of cacahuates in the !free/libre state and the set pieces called sombra (may need to add a group called sombras for this test). The member of cacahuates moves right unless it would overlap with sombra, then/else it moves down.

[rafaelfajardo]

this has been resolved by ChrisGD