Initial commit of code for measure visual. 

Added D3.js
Replaced hard coded populations with code to pull from Thorax.Models.Measure.allPopulationCodes
began refactoring to be clearer to read
refactored, added in temporal references
Added lookup for population names and fixed spacing between populations
Initial measure viz toggling, single population functional
Update for better rendering; need population codes fixed for multiple populations
Functional measure view toggling for multiple populations with sloppy height fix
Clean up code after rebase on master
Fix tabs in visual code, change button name, remove autotype from vendors
Initial testing for measure visualization fixes
Testing measure visualization logic on all eh measures
Update element height logic
Update styling for measure visualization
Remove console.log and testing route
adjust size of viz
add css classes for measure viz styling
have showRationale control svg styling too
edit showCoverage to use classes
edit clear coverage and clear rationale to work with svg