first readme and license
updated readme with new syntax
can create worlds
initial bump and World implementations
implemented brute force algorithm
spacing
refactor. Added more tests for world:check.
collision detection now handles tunelling
removed col.self, renamed col.other to col.item, added col.ti and col.tunneling
modified test description
added .travis.yml
sort collisions by ti
World:remove
started working on cells
removing elements removes cells. now, to the interesting part
algorithms renaming
small refactoring
another small refactoring
undo unnecessary refactoring
the magic of movement accross cells with items