Show all countries in data set
Merge pull request #12 from mathew-hall/select_all_countries

Show all countries in data set
Toggle between "all countries" and selection with a conditionalPanel
Merge pull request #14 from mathew-hall/conditional_all

Toggle between "all countries" and selection with a conditionalPanel
Add library imports for ggvis and remove ggplot
Merge branch 'master' into ggvis