Port to 1.20.1 and fix bugs in tape storage module

• Bump version to 0.3.1.

• Fix incompatibilities caused by MixinExtras version mismatch.

Changelog.

Add the following new modules:

• Seven Segment Display.

• Radar Module.

• Radio Module.

and the following new instructions:

• JIN (Jump if NaN)

• JNN (Jump if not NaN)

Port to 1.19.2.

• Bump version to 0.3.1.

• Fix incompatibility caused by version mismatch of MixinExtras.

Add the following new modules:

• 7 Segment Display.

• Radar Module.

• Radio Module.

and the following new instructions:

• JIN (Jump if NaN).

• JNN (Jump if not NaN).

Add the tape storage module and compiler support for floating point literals, and fix crash on dedicated server.

Initial Release.