Reformatting navigation bar in ReST documentation to add Github button
Refactor Far::StencilTables and factories

- minor code cleanup (style consistency)
- move proto-stencil code out of the stencil factory
  in anticipation of Gregory stencils implementation
Fix vtrViewer - breaks introduced by single-crease patch additions

note: adaptive wireframe display still needs work
Fix Far::StencilTables batch evaluation bug

Setting start/end values of UpdateValues() produced incorrect primvar interpolation
because the stencil sizes array was not shifted properly to the 'start' location of
the batch.