Forward back swipe/browser/android back enabled

[atreestump]

I have added the abllity to use your browser forward and back buttons across the site, sounds like it should be obvious but the way Atrium is constructed (like a self contained app) means you have to instruct it to allow that feature. I am learning new things all the time! When you are used to just making webpages that inherently support forward and back you din't have to think about things like this.

This means that forward and back swipes and android back buttons will now work across the site.

Makes the site more intuitive to use.