v0.6.0-beta

bugfix:

• When poop is spawned the scenery placed underneath is still displayed
• poop makes trees disappear when placed on top
• scenery's visibility not well asserted when stepped onto by a transparent shape or multiple shapes of variable transparency
• if poop is spawned on top of another poop the previous one never gets deleted
• disable grid rotation and shortcuts when dialog windows are displayed or  if  keys are currently being remapped
• when scenery is spawned underneath an item it shouldn't be displayed
• spawned candles aren't on fire

update:

• scaling shapes higher up than the height limit messes with the size of the map (36 in base 35 is 10)
• create a distinction between items and powerups
• Turn Duck/Poop into items instead of scenery elements
• when the mouse is hovering above the map in edition mode, highlight only the right layers
• update PLAIN map by increasing water level and in doing so increasing its gameplay added-value
• make Mr QuacksALot flap its wings
• add Poops and Ducks to the Park map
• save items edition history
• move the "terrain" tab up and the "map" tab down in edition menu
• update the Pond map
• make "last survivor" option disabled by default
• give dialog windows rounded corners
• give control columns (up, right, down, left) their own icons
• give edition buttons rounded corners