Only use the amount of memory needed in sharedbuffergeometry based on networked-drawing configuration. Only create a sharedbuffergeometry object when a pen is first spawned.
Also, reduce the amount of memory used by primitive entities (cursor, spawned pens, teleport-controls)

allow changing color and scale via mouse when holding alt or shift keys; fixing/changing input for rift.

Our build machine seems to have a problem pulling down GitHub dependencies
via NPM, so reverting this until I can diagnose and resolve that.

This reverts commit e02d6d40, reversing
changes made to eda4fc74.