v0.7

• Add Conversion tool - convert existing walls to Indy Walls, with preview and tolerance sliders
• Add Cleanup tool - snaps points together with user-configured tolerance and deletes duplicate walls
• Add secret/open door glyphs
• Add ability to show/hide individual segments of curves within polylines
• Add separate colour/size settings for shape center grab points
• Add ability to change wall types by hovering over them and using hotkeys outside Indy Walls editor
• Fix: rectangle vertex hit test radius - simplify selection routine
• Fix: inserting points moving gaps/doors in side-walls/polylines
• Fix: editing walls/shapes no longer deletes any flags/data on them