Update to latest Font Awesome

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #24 from GordonSmith/FA_LATEST

Update to latest Font Awesome
Merge pull request #23 from GordonSmith/CHORO_COUNTIES

Add Choropleth Counties
Refactor Widget Base Classes

Rename D3Widget to SVGWidget
Add HTMLWidget

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>