Merge pull request #46 from alexabbott/Brian'sBranch

Brian's branch
precompile assets
Merge pull request #47 from alexabbott/alex

precompile assets
Remove D3 and add population density placeholder
Merge pull request #48 from alexabbott/alex

Remove D3 and add population density placeholder
Merge pull request #49 from alexabbott/Brian'sBranch

Added density data to results page and updated bar charts
Consolidated density data, testing performance
Consolidated density data, testing performance
Merge branch 'Brian'sBranch'
Resolved merge conflicts
precompiled assets locally