create and kill structure work
stop creation of creatures on top of others
randomize structure locations for OOB check
give structures alignments, still string for now
gives structures integer alignments
gives spells integer alignments
add tests for virus/emp/alignments
add classes for all spells
add cast_spell for emp/virus/align/resurrect
add tests for disrupt/disintegrate
add disrupt/disintegrate to cast_spell
change alignment classes/spells to one class
fix indentation
added commander as a creature
make spawn_commanders scalable/tested
add Commander.up() for blaster/symbiont etc
correct a few starting positions
correct commanders representation/functions
add test for upgrades
make print_board() prettier with a grid