simplified test case for webgl
use webgl bars in the bar chart
Added background elements
split bar chart into foreground/background to improve performance
removed webgl from bar graph foreground declaration, created speedometer background
Added custom gauge needle node
fixed lint issues
only apply webgl for iOS8 + WebGL
restored initial conditions
updated version to 1.0.0-dev.67
Fixed layout bounds
Initial work on custom WebGL pie chart, currently just a circle
Added pie chart in WebGLNode
Use PieChartWebGLNode only when webgl is the renderer.  Made PieChartWebGLNode visible/invisible change with checkbox
show the pie chart above the skater's head
removed extra webgl canvas layer
updated version to 1.0.0-dev.68
fixed lint issue
Use a separate texture for left/right skaters to avoid WebGL performance issues when switching textures
updated version to 1.0.0-dev.69