Upgrade RequireJS to version 2.1.6, and Almond to 0.2.5.

Also additionally include the minified version of require.js, useful for future builds.
Merge remote-tracking branch 'origin/master' into updateRequireJS

Conflicts:
	CHANGES.md
Fix path to almond.
Test fixes for Mac on Chrome and Firefox
Minor cleanup
Add a web font to use in specs, "Open Sans".
Merge pull request #844 from AnalyticalGraphicsInc/updateRequireJS

Upgrade RequireJS to version 2.1.6, and Almond to 0.2.5.
Fix a test that was flawed in several ways.
Change font used by test
Fix the way visibility is reset to default.
Improve specs to pass more reliably based on font differences.
Merge branch 'consistentFonts' into macbook
Updates CHANGES.md
Merge pull request #845 from AnalyticalGraphicsInc/consistentFonts

Fix problems with font-based specs
Merge master to macbook
Adjust test to round colors between 0 and 255 to 255 to account for systems that use subpixel anti-aliasing for text on canvas.
Merge branch 'fixWriteTExtToCanvasSpec' into macbook
Merge pull request #846 from AnalyticalGraphicsInc/fixWriteTextToCanvasSpec

Adjust test to round colors between 0 and 255 to 255 to account for systems that use subpixel anti-aliasing for text on canvas.
Merge remote-tracking branch 'origin/master' into macbook
Merge pull request #847 from AnalyticalGraphicsInc/macbook

Fix test failures on Mac