Stop using title attr

Built-in tooltip from Chrome was triggered on hover, because we were using the 'title' attribute for angular logic.

This screenshot shows the bug:

![screen shot 2014-10-21 at 11 52 46](https://cloud.githubusercontent.com/assets/2903904/4717113/86224644-5910-11e4-838e-eee05cef9d09.png)