message: Projects.md: Move Zemeroth to 0.5.x section
  Also, fix heading levels
diff: This is a place for people to pimp their stuff that is built with ggez. If you want your project listed here, add it and
  submit a PR, please!
  +# 0.5.x
  +
  +## Games!
  +
  + * <https://github.com/ozkriff/zemeroth>
  +
  # 0.4.x
  -# Games!
  +## Games!
  * <https://github.com/MushuYoWushu/mehens_portable_casino>
  * <https://github.com/maccam912/thewizzerofoz>
  * <https://github.com/Piripant/skii>
  - * <https://github.com/ozkriff/zemeroth>
  * <https://github.com/Swampsoft/solitaire>
  * <https://github.com/obsoke/rustris>
  * <https://github.com/vinceniko/tetrust>
  @@ -16,18 +21,18 @@ submit a PR, please!
  * <https://github.com/conwayste/conwayste/>
  * <https://github.com/avandolder/tetrominoes-rust>
  -# Examples/tutorial code
  +## Examples/tutorial code
  * <https://github.com/ggez/game-template> -- a general-purpose getting-started template integrating warmy, specs, and some other useful tools.
  * <https://github.com/termhn/ggez_snake>
  * <https://github.com/rafaeldelboni/ggez-specs-hello-world> -- A simple hello world project using ggez and specs.
  * <https://github.com/rafaeldelboni/ggez-specs-rhusics-hello-world> -- A hello world project using ggez, specs and rhusics for physics.
  -# Tools/add-ons
  +## Tools/add-ons
  * <https://github.com/ggez/ggez-goodies> (incomplete, but maybe useful to someone)
  -# Written things
  +## Written things
  # 0.3.x
  