* Change 'accessible' to align with React Native.
* Add support for 'importantForAccessibility'.
* Stop event propagation for keyboard-activated Touchables (nested
Touchables now respond the same as when touch-activated).
* Fix whitespace layout of nested Text elements.
* Use 'div' for Text to improve TalkBack grouping.
* Rewrite accessibility docs.
Close#382Fix#408
1. Fix auto-flipping of styles
The StyleRegistry didn't account for LTR/RTL when caching the results of
style resolution. The 'writingDirection' style is no longer flipped; no
clear use case for it.
2. Remove experimental '$noI18n' style prop suffix
This feature is essentially unused, and less likely to be used with the
introduction of 'dir=auto' on 'Text'. Removing also marginally improves
render performance.
Add `I18nManager` API from React Native. This can be used to control
when the app displays in RTL mode.
Add `$noI18n` property suffix for properties that StyleSheet will
automatically flip. This can be used to opt-out of automatic flipping on
a per-declaration basis.
- infer underlying HTML tag from 'accessibilityRole'
- move accessibility props to 'CoreComponent'
- remove the 'component' prop from exported Components
Fix gh-23
