remove final strip and fan rendering functions
remove renderCache (only works with triangle fans) and libtess.render.computeNormal_
update libtess.min.js
remove outdated comments
remove now unused constant
remove FaceCount.js

unneeded since always one face per emitted primitive
inline what's left of renderMaximumFaceGroup_
remove GluHalfEdge.dPrev from coverage since no longer called
render triangles directly, instead of making a list to render first
remove state variables now unused by rendering
fix doc strings at top of files affected by rendering changes
add triangles-only assertion to renderMesh
remove tess.flagBoundary in favor of a simple argument
Merge pull request #9 from brendankenny/onlyTriangles

Only emit triangles, regardless of GLU_TESS_EDGE_FLAG