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
Starting a couple of versions ago, animations in navbar stopped working.
I took this as a chance to fix this, and ddo a refactor to make the code
more modular and testable.
Lots of manual dom manipulation was offloaded to angular directives, and
now we will not have bugs with end-user using interpolated class
attribute on their own nav-bar and overriding our own manually added
classes.
