v0.12

The major addition in this update is an input config menu, by request:

The font comes from a 1994 French-language office shareware CD for Macintosh (https://discmaster.textfiles.com/view/16332/Reperages%2094%20-%20Version%202.iso...).

Other changes:

• Bumped the version to v0.12
• Removed cruft
• Fixed the "vector must be normalized" message when rotating the player and other similar noise at the shell
• Fixed a bug that might have caused the octopus symbol to not be displayed in some environments