v0.1.0

• Package GD and Perl in the AppImage so that pngcam works on more systems
• Check for illegal inputs (zero, negative) and either warn or reject them
• Various UI glitch fixes and improvements
• Diagrams in tooltips
• Internally plot intermediate heightmaps between jobs so that roughing isn't repeated
• Ramp entry
• Omit top
• Cut beyond edges
• Fix memory leak
• Make step forward an option instead of copying it from step over
• 24-bit depth on heightmaps instead of 8-bit