Fix #376

Add animationTimeAdjustment to WWA-only code so that "Fast animations" doesn't cause Tooltip tests to fail in WWAUnitTestsApp.
added styles to center div in ie10 and safari
created test to make sure that FlipView content is centered in screen when item is smaller than FlipView
added horizontal and vertical versions of test
removed old test for checking if layout was centered
moved inactive test to bottom of the file
formatting changes
added flexbox mixins
hardcoded flipView sizes
removed unnecessary Math.ceil
changed pixelToInt calculation
Update AppBar Ellipsis invoke behavior.
closes #403
closes #404
closes #408
Fix #410

This change does a few things:
* All controls now explicitly depend on their base styling. Previously they did so implicitly due to LESS variables.
* Remove special knowledge in requirejs modular build due to the aforementioned implicit dependency.
* Remove dependency on mkpath since we have the more powerful node-fs-extras.
* Rewrite require-style to use node's "path" module for proper directory manipulation.
Separate out globalization styles
Move RTL string to typography
Add globalization module to missing places
Add x plat fonts to font fallback list
Merge with jeff's changes
Merge _UIUtilities into _ElementUtilities.
Fix #419

Pages regression caused by 22db3ad20a42c6779fc794bdaf6563c966759d51.
Merge pull request #426 from winjs/xirzec/fix419

Fix #419
passing information about TRAVIS_PULL_REQUEST