Compress or delete (unused) textures

[Niklp09]

• Delete all textures in "old & unused" folders
• Compress all remaining textures w/ optipng

Results: (used find . -name "*.png" | xargs du -sch (there are maybe better commands idk:-))

• Before: 1.4M
• After deletion: 800K
• After compression: 776K

[OgelGames]

"optimize" is the correct word to use; optimization is lossless, compression is not ;)