Fix out of date CDN link for event images

Changed from cdn.steampowered.com/v/gfx/apps/ to cdn.akamai.steamstatic.com/steam/apps/ as suggested by dscharrer.
Fix out of date CDN link for event images

Thanks to dscharrer
Merge pull request #82 from Cheeseness/master

Cast Page and News Page Tweaks
Fixed typo in avatar CSS
Swordfischer gets the gravatar treatment too
Use ALT attributes for our avatar pics
Added GameQ protocols for King Arthur's Gold, Running with Rifles and Steel Storm.
Merge pull request #85 from hypercephalickitten/master

Added GameQ protocols for King Arthur's Gold, Running with Rifles and St...
Merge pull request #84 from johndrinkwater/fix-cast-alts

Use ALT attributes for our avatar pics