refine green_3 ground tiles further
fixed green_3 tiling
changed coins to gems
increased resolution of gems and small visual fixes
update settings files to make gems smaller
fix final visual issues w green_3 ground
turned spin boxes into wooden crates
Update author for green_3, gems and spin crates
increased resolution of spin crate frames
update tiles resolution and author settings (again)
added source files for gems, green_3 and spin crate
Merge branch 'add-some-graphics-by-bugsbane' into release-2.0.0