Add Slider Control

Fixed marshaller issues with latest test service (which includes a slider).

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #22 from GordonSmith/SLIDER

Add Slider Control
Add Choropleth Counties

Split States and Counties into two different widgets.
Delete ChoroSurface

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
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>
Merge pull request #25 from GordonSmith/D3_TO_SVG

Refactor Widget Base Classes