add lifelines vega

add lifelines vega from the vega examples to provide another example how
we might integrate R and d3 through a clickme ractive and vega
allow list and dataframe in translator.R

change get_data_as_json to handle both lists and data.frames;  think
eventually combine this with get_data_as_json_file also and handle
through an option passed to function
small fix: removed test temp files
Merge branch 'master' of github.com:timelyportfolio/clickme into timelyportfolio-master

* 'master' of github.com:timelyportfolio/clickme:
  allow list and dataframe in translator.R
  add lifelines vega
added lifelines from @timelyportfolio