Upload support detection

UploadSupportDetection.js

function isUploadSupported() {
    if (navigator.userAgent.match(/(Android (1.0|1.1|1.5|1.6|2.0|2.1))|(Windows Phone (OS 7|8.0))|(XBLWP)|(ZuneWP)|(w(eb)?OSBrowser)|(webOS)|(Kindle\/(1.0|2.0|2.5|3.0))/)) {
        return false;
    }
    var elem = document.createElement('input');
    elem.type = 'file';
    return !elem.disabled;
};