ENHANCED: Wipe VOP

Better parameter defaults and parameter help strings.
Merge pull request #8 from gadfly16/wipe_VOP

ENHANCED: Wipe VOP
ENHANCED: Super Light OBJ

Ability to switch to grid or circle without shading.

Support of independent outer color and opacity shape.

"Fast" mode with fewer options but faster execution.

Separate ST space shape correction.

Example scene includes a basic point instance setup.
Merge pull request #9 from gadfly16/super_light_OBJ

ENHANCED: Super Light OBJ
Merge branch 'dev'
Merge branch 'master' of https://github.com/qLab/qLib