0.18.3

shift:
-cut 1-braid_raceway, 1-bulbert, 1-exit_hatch, 1-scarf, 1-spooky_slide, 1-the_watchers, 1-w_gravity, 1-abduction, 1-haunted_treasures, 2-lush_maze, 2-pipe_gap, 2-sand_game, 2-vertiginous_navigation, 3-apple_pickin, 3-bramble_branch, 3-fans_and_vines, 3-nightwalk, 3-speedcubing, 4-cold_and_hot, 4-quadrants, 5-blue_plate_special, 5-bolt, 5-greenery_1, 5-riptide, 5-speed_control_I, 6-crystal_cavern, 6-ribbon, 7-dots, 7-rainbow_stairs_2
-add 1-candies by Talon
-add 1-mirror_image by Talon
-add 1-water_derby by Talon
-add 2-impact by Talon
-add 2-topsy_turvy by Talon
-add 2-windswept_sands by Talon
-add 3-hue_the_whirl by Talon
-add 4-infernal_cavern by Talon
-rename 1-big_pants -> 1-huge_pants
-rename 1-hermes -> 2-hermes
-rename 2-ploppy_pool -> 3-ploppy_pool
-rename 4-traps -> 3-traps
-rename 4-red -> 5-red
-rename 4-sultan_of_spin -> 6-sultan_of_spin

custom worlds:
-Changed world save format to something more versetile. No longer uses pixel transparency but instead stores additional information in a watermark on the bottom of the image

bugfixes:
-snake: fixed rollback error when dead
-snake: better midjoin sync