jqueryが読み込まれる前のSCRIPTでjqueryが使えるようになるまで待つ

.wait_jquery.RawGit.html

<!-- load a gist directly by using RawGit -->
<script
type="text/javascript"
src="https://cdn.rawgit.com/takamin/d39bf8ccff805baecb1b/raw/faf22f4f507673ce3143b82ee842dcf5b2130c2a/wait_jquery.js"
></script>

wait_jquery.js

var jq_callbacks = [];
function $(callback) { // (^^;
    jq_callbacks.push(callback);
}
(function() {
    // jQueryが使えるようになるまで待つ
    var check_count_max = 100;
    var check_count = 0;
    var wait_jquery = function () {
        window.setTimeout(function() {
            try {
                if(jQuery) {
                    for(var i = 0; i < jq_callbacks.length; i++) {
                        jq_callbacks[i].call(null, jQuery);
                    }
                } else {
                    throw "no jquery";
                }
            } catch(e) {
                check_count++;
                if(check_count < check_count_max) {
                    wait_jquery();
                } else {
                    $ = null;
                    for(var i = 0; i < jq_callbacks.length; i++) {
                        jq_callbacks[i].call(null, null);
                    }

                }
            }
        }, 300);
    }
    wait_jquery();
}());

wait_jquery_sample.html

<!-- sample -->
<div id="wait_jquery_status" class="jquery_available"
style="width:100%; padding:10px; font-weight:bold;
font-size:16pt; text-align:center; color:white;
background-color:red;"
>ちょっと待ってね♪ jQueryの読み込みを待っています・・・</div>
<script>
try {
    //$ is NOT a jQuery
    $(function(){
        if($ == null) {
            throw('timeout')
        }
        //this one is a jQuery
        $('.jquery_available')
            .css('background-color', 'blue')
            .html('お待たせしました♪ jQueryが利用可能です');
    });
} catch (e) {
    var e = document.getElementById("wait_jquery_status");
    e.parentNode.removeChild(e);
}
</script>