This pull request refreshes the easter egg program Horizon. Both the C and Basic versions are provided with suitable makefiles using either gtbasic or glcc. I did this when writing SYS_ScanMemory because I was initially mistaken in believing that I was short in ROM space. This is otherwise not very important but helps reproducibility with source code and makefiles.
Summary
This pull request refreshes the easter egg program Horizon. Both the C and Basic versions are provided with suitable makefiles using either gtbasic or glcc. I did this when writing SYS_ScanMemory because I was initially mistaken in believing that I was short in ROM space. This is otherwise not very important but helps reproducibility with source code and makefiles.