groups now are rendered whether there are 0, 1, or >1 group, and nested groups tentatively appear to not crash the renderer
Merge pull request #92 from AlexanderPico/master

migrating symbols to path-shapes; cell, rnd-rect, complex and ER are done
Merge pull request #93 from AlexanderPico/master

	all path-shapes are complete!
Merge pull request #12 from wikipathways/master

update ap:master with latest work and builds from wp:master