Merge pull request #42 from SimonbJohnson/master

sync to master
Replaced pie chart with two week cases bar chart
Converted format of WHO data to match output from crossfilter
Map Legend added
Changed keystats style. Added the ability to add/remove filter on bar chart
Regional breakdown charts added
Added stray bracket
Merge pull request #43 from SimonbJohnson/weekly-change-graphs

Weekly change graphs