Only update data if refreshData is set to TRUE - otherwise load data from Rda.
Updated data & screenshot; added some comments to the code. Good enough for now!

It'd be good to add some extra filtering to deal with tweets with more than one numeric value in them & make for a more robust dataset.
Updated data with new tweets.
Merge branch 'master' of github.com:mikebirdgeneau/yyckidcount

* 'master' of github.com:mikebirdgeneau/yyckidcount:
  Update README.md