RD|BS: Allow the accordion to accept basic html tags in the title

We haven't bumped the version number, not sure whether this is a bug fix or a minor change. Probably the latter as it adds functionality.

- Should accept b, strong, i, em tags
- A script will be rejected upon toggling, it's up to the developer to reject this in their server side code though
- No img tags allowed

Amaze.
![tim-and-eric-space-explosions](https://cloud.githubusercontent.com/assets/3900160/2697032/5a425800-c3e9-11e3-9b91-936c9cb9c128.gif)