Merge pull request #211 from AlexanderPico/master

Fixes wikipathways/pathvisiojs#210
update group rendering to fix Issue #209
build and update
cleaned up condition when no groups
Fixes Issue #101
added pathways for tests
rename pathvisiojs-json to pvjson
Merge branch 'master' of https://github.com/wikipathways/pathvisiojs
added defaults for datanodes of type 'Complex' to fix Issue #212
update version and build
change from using @id to just id for readability
clean up interactionType determination
added test files
removed unneeded file
minor changes
build and test
update handling of GPML defaults, so far only for backgroundColor/FillColor
refactor gpml interpretation
selector is working
element highlighting appears to be working well