calm down, man

Add throttle to the spacebar, so you can no longer load another image
whilst the old one is loading.

Hopefully this'll negate some of the API failures we've been getting.

views/imgur/imgurr.jade

@@ -10,8 +10,10 @@ html(lang='en')
       function giveMessage(msg) {
         $('<li>'+msg+'</li>').prependTo('#history').hide().slideDown();
       }
+      var lock = false
       function getNewImage() {
         count += 1;
+        lock = true;
         $('#loading').fadeIn();
         $('#loading').text('Loading image ' + count + '...');
         document.title = 'random imgur (' + count + ')';
@@ -19,6 +21,7 @@ html(lang='en')
         $('#image').load(function(){});
         $.get("/api/imgur/getRandomImage", function(d) {
           $('#image').attr('src', d.data[0]);
+          lock = false;
           $('#details').text("Fetching info...");
           giveMessage('<a href="' + d.data[0] + '">' + d.data[0] + '</a>');
           $.get("/api/imgur/getImageInfoString", { 'slug': d.data[1] }, function(info) {
@@ -37,7 +40,13 @@ html(lang='en')
         switch(e.which){
           case 13: // enter
           case 32: // space
-            getNewImage();
+            if (lock) {
+              $('#loading').text(function(index, text){
+                return text.replace(/\.(?=[^.]*$)/, "!");
+              });
+            } else {
+              getNewImage();
+            }
             break;
           case 83: // s
             $('body').toggleClass('crop');