fix(headerBarView): check for null in getTextBounds

In Android <= 4.3, getBoundingClientRect does not return a rect for a
text node, closes #1377.
fix(utils/dom): do not add rAF polyfill to window

A pull request (#1430) was merged that added a requestAnimationFrame polyfill to
the window on platforms that do not have rAF.  This was overlooked.
This now has created conflicts with Angular 1.2.17 on Android browsers
that do not have requestAnimationFrame.

The problem was that a polyfill for requestAnimationFrame was put onto the
window for Android <4.3. AngularJS would then check if
window.requestAnimationFrame existed.  Angular's check passed, and then
it would try to use cancelAnimationFrame which was undefined.

Now, nothing on the window is changed.
chore(docs): correct version drowp down links in nightly build
fix(cancelAnimationFrame): polyfill in ionic.DomUtil
chore(build): fix release script bugs
feat(ionicons): upgrade to Ionicons v1.5.1
feat(ionicons): v1.5.2 upgrade w/ :before pseudo
chore(karma): switch back to chrome testing
test(tap): update tests so nodeType exists
pre-release: v1.0.0-beta.8
release: v1.0.0-beta.8 "einsteinium-emu"
Update CODENAMES
Update CHANGELOG.md
chore(): fermium-flamingo codename fix
chore(): update CODENAMES
chore(): remove new codename
chore(deploy): make deploy tasks for site not parallel
fix(gestureDirectives): fix problem with event being passed in
Update actionSheet.js

fixed a typo at the params description
Merge pull request #1639 from arturokunder/patch-1

Update actionSheet.js