fixing percent college education target
Added Gitter badge
Merge pull request #33 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
removing variable dropdowns with missing data (issue #28)
4sq stuff
Merge branch 'gh-pages' of github.com:codeforboston/ungentry into gh-pages
Merge pull request #32 from bendman/variable-targets-fix

removing maps/variables with missing data
Merge branch 'gh-pages' of github.com:codeforboston/ungentry into gh-pages