Previously I disabled the activation class immediately on a touchmove,
where as the click will still work if you touchstart and touchend
within a few pixels of each other. So visually it may have looked like
the click shouldn't have worked. I just updated it so the use the same
numbers. For example, if you hold down an item and move just 5 pixels,
the item will stay active (before it wouldn't have), and the click will
fire. But at the same time, if you hold down an item, and move a larger
distance, once it realizes that it went farther than 6 pixels it'll not
allow a click to happen, AND it'll not show the item as being active.
BREAKING CHANGE: All directives are now prefixed with `ion-`.
For any directive you use, add the ionic prefix.
For example, change this HTML:
```html
<tabs>
<tab title="home" href="/tab/home">
<content>Hello!</content>
</tab>
</tabs>
```
To this HTML:
```
<ion-tabs>
<ion-tab title="home" href="/tab/home">
<ion-content>Hello!</ion-content>
</ion-tab>
</ion-tabs>
```
This requires us to set fullscreen="false" in our cordova apps.
Uses the resize event to determine when the keyboard has been shown,
then broadcasts an event from the activeElement: 'scrollChildIntoView',
which is caught by the nearest parent scrollView. The scrollView will
then see if that element is within the new device's height (since the
keyboard resizes the screen), and if not scroll it into view.
Additionally, when the keyboard resizes the screen we add a
`.hide-footer` class to the body, which will hide tabbars and footer
bars while the keyboard is opened.
For now, this is android only.
Closes#314.
