fix playButton click handler
update font to beta.1

* add icon class to all elements that needed it
* change icon names to new ones

4 social service icons missing (g-plus, Twitter, ADN, Facebook).
update podlove-font to 2.0.0-beta.2

This adds the icons of popular social services to the font.

You will need to run `bower update` to see the changes, if you had
a previous version installed.
enable sharing on google+ and Facebook
cleanup
improve tab sizing
Merge branch 'font-update' into dev

Conflicts:
	src/sass/_tabs.scss
fix active tab indicator