Update changelog

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## [0.1.0] - 2021-04-26
+ - 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
+
 ## [0.0.3] - 2021-04-17
  - UI glitch fixes
  - Settings window