Fixed map position on all major browsers

- Changed svg.datamap to overflow: visible. Allowed users to see entire
D3 map.
Hardcoded topojson.js and d3.min.js into app
Updated README.md file
Updated README file
Merge pull request #1 from ZackDinerstein/master

Fixed map position on all major browsers & hardcoded topojson.js and d3.min.js into app