112 better installation instructions
114 fix setup.py 111 bug: mitosis can create creatures on traps, without triggering them 110 bug: creatures and stairs are sometimes placed on top of traps 96 bug: two characters switching places cause level to be in inconsistent state
113 bug: items dropped in pit are floating 97 bug: level generation sometimes places multiple characters in same location 89 bug: CharacterBuilder does not add character to given level 25 bug: dying should make game to return to main screen 21 bug: PyQt user interface does not support line of sight
109 event system restructure