1.2.1: Unity 6.3 signing

Added

• Added signing for Unity 6.3.

1.2.0: Triangle shape

Added the Triangle shape type.

1.1.1: Teapot tweaks

• Slightly flattened the bottom of the pot (the original model is too convex to be laid on a surface).
• Shrank the model (the original model is too big compared to the other primitive models).

1.1.0: New shape

• Added the Teapot shape type.

1.0.2: Feature additions

• HDRP/URP default material support (PR #6)
• Readable mesh option (PR #5)

1.0.1: New shapes

• New shapes: Disc and Ring