A few bug fixes

There were a few small bug fixes that, even though old, were serious enough to warrant a new release.

This also finalizes the implementation of allowing full expressions for embeddings.

Changelog

e53305e cue/parser: allow full expressions for embeddings
0ac550c cue: eliminate generation of block quotes
7c9b88c cue: fix bug in type inference
fdd9b71 cue: fixes number groundness inference