Prevent the code from running if there is no window.history object
#32 update version in bower.json and package.json
#33 Links with href='/' not working in ie <= 9
fastfix - #29 pushState not working on Chrome on IOS 6 (ipad)
#34 sessionStorage throws error when cookies are disabled
Merge branch 'master' of https://github.com/devote/HTML5-History-API