Modify LineGraph append so it's 1st arg may be a single widget or an array of widgets
Merge branch 'upstream/master'
Change the test appending 2 widgets one at a time to appending them in the same append call
working towards highlights on new labels
Merge pull request #13 from mlippert/widget-refactor

line graph append now works w/ array of widgets
commented out old code to do interaction tracking
highlights on new labels, without IDs, and with keys - I win.
updates to new CSS