Main changes:
* Use gulpfile now (build was getting way too disorganized with custom
tasks; gulpfiles are much easier to build clean custom tasks with than
Grunt.
* View README#Development for updated commands
* Docs written for ionContent, ionHeaderBar, ionInfiniteScroll.
* Docs are pushed to ajoslin's fork of ionic-site until they reach a
* point where they can be published.
**TODO, In Order of Priority**
1. Finish writing source-documentation for all existing components
2. Add multiple versions of docs (one per release & nightly, latest
stable release docs being shown by default)
3. Add examples generation
4. Add searchbar to docs
Fixes#521. Reordering now uses webkitTransform instead of
element.style.left. Additionally, as you drag the drag-element to the
top or bottom of the scroll-area, it will scroll it up or down as
allowed.
Refactors necessary: Common code from `<content>` and `<scroll>` moved
into js/ext/angular/controllers/ionicScrollController. Then `<content>`
and `<scroll>` expose the controller, and `<list>` can require it.
`<list>` then uses the controller (if exists) to pass the scrollView and
scrollEl to ReorderDrag, and ReorderDrag uses that to scroll.
Additionally, js/ext/angular/test/controller/ionicScrollController tests
much functionality that was untested before.
