Updated README to reference Bower
Updated README to reference Bower

robcolburn/web-animations-demos,web-animations/web-animations-demos,web-animations/web-animations-demos,alancutter/web-animations-demos-old,samthor/web-animations-demos,dstockwell/web-animations-demos,web-animations/web-animations-demos,dstockwell/web-animations-demos,robcolburn/web-animations-demos,samthor/web-animations-demos,samthor/web-animations-demos,robcolburn/web-animations-demos,alancutter/web-animations-demos-old