remove whitespace

Change-Id: Ia8b664f09da0008bde48e55a144e63965dd00609
remove camera positioning from OpenGL code

Change-Id: I70a654282e8b187bc3d78041c44af17a11b4a622
add text on both sides of the chart

Change-Id: I12d5f5e92bf908bc6d8fbd0e88293e1fcaa31c96
fix chart background color

Change-Id: I4bda3201dff1094a7fd646c620b016532a4fbc77
add a text cache to improve rendering performance

Change-Id: I5b3fbe9476f0eafed4524f57aa7bf65dfd029c1d
much improved camera control for 3D chart

Change-Id: I5acc481db01e2ea66c11933ec05f222858ba36f9
some work on mouse scrolling and improved mouse dragging

Change-Id: I3265e26530183b2fc4fd7f67319f3dc124353c2e