Added events for loading ads
Moved community-specific styles to community
Make tabs component more configurable
Add right column variation, add fill components to card page component
Update the tabs component to look a tad more like our other components
Fix the code highlighting for markup on the proximity loader page
Add Tabs styleguide page
remove flickr banner header
url_validator raises InvalidUrl error when nil is given

This fixes "cryptic" errors that we were getting from Airbrake. If
anything goes wrong with #heuristic_parse it's perfectly fine to raise
InvalidUrl error and handle it.

```
Addressable::URI.heuristic_parse(nil) #=> nil
nil.path #=> NoMethodError
```
Dynamic maps are not dynamic on small screens
Merge pull request #811 from lonelyplanet/matth/card-fill-small-screen-stuff

Small screen stuff
Merge pull request #813 from lonelyplanet/br_remove_flickr_banner_header

Remove flickr banner header
Improved responsive timeago functionality
Refactored timeago config to custom component
Ensure Stumble Upon button triggers a new window
Update adsense template
Added spec for ads visible/hidden events
Merge pull request #817 from lonelyplanet/if-adsense

Update adsense template
Merge pull request #799 from lonelyplanet/bart/abuse-flag-fix

Added events for loading ads
Merge pull request #816 from lonelyplanet/chee/stumbleupon

Ensure Stumble Upon button triggers a new window