extract main editor pane into separate user control
implement screen cleave tool
fix display of tile sheet in editor
add save prompt on close
add spritesheet gap field, rename project to wilys lab, restyle buttons
add tiling brush and bucket tools
implement eyedropper right click behavior
fix usage of megaman 2 font
tiling selection tool
rectangle tool and cursor snapping
add outline to tile cursors
border around tile cursor, split tiling toolbar into two controls
add tileset properties editor