IE Issues for touch

[ddproxy]

WikiWatershed/model-my-watershed#502

❌ Internet Explorer 11.0.9600 on Surface Pro 3 running Windows 8.1 Pro — The site does not render at all because IE on Surface does not support the touch events in Guild's repo and throws an error.
❌ Chrome 43 on Surface Pro 3 running Windows 8.1 Pro — Touch interaction works (when you touch the screen with a finger), but click interaction (with trackpad and stylus) fails to close the polygon, instead keeps adding new overlapping points.
❌ Firefox 38 on Surface Pro 3 running Windows 8.1 Pro — Click interaction works (when you use trackpad or stylus), but touch interaction fails to register a mouseclick event. Each touch acts as a hover / mousemove event instead of a click.

[ddproxy]

Internet Explorer render issues resolved with most recent commit.