Set color method for sketches now affects text as well.
Set color method now changes the fill of wedges. Introduced problem with color transition overriding other transitions. Make sure to call setColor after previous sketch transition is finished.
Tried working on hash-wedges. Code is commented out for now.
Merge branch 'upstream/master'

Conflicts resolved:
	js/widget-sketch.js
Merge branch 'upstream/master'
New demo files
Changed set color method so it changes the color of text and the fill in wedges.
Sketches can now include wedges of type "hash". This type uses an svg mask to hide parts of the wedge. The mask follows the wedge when it is reflected or moved.
Merge branch 'upstream/master'
Image viewer test now includes a slider control. Moving the slider changes which image is currently selected, and selecting images with the mouse also changes the slider value.
Merge pull request #38 from jvish/review

Review
Merge branch 'upstream/master'

Conflicts resolved:
	EnergyParabola.html
	PhysicsResistance.html
	animationTests.html
	imageTests.html
	js/toc-structure.js
	js/widget-sketch.js