add Ox.Log, determine Ox.PATH by looking at the _last_ Ox.js script

source/Ox/js/Constants.js

@@ -77,7 +77,7 @@ Ox.SHORT_MONTHS = Ox.MONTHS.map(function(val) {
 //@ Ox.PATH <str> Path of Ox.js
 Ox.PATH = Ox.makeArray(
     document.getElementsByTagName('script')
-).filter(function(element) {
+).reverse().filter(function(element) {
     return /Ox\.js$/.test(element.src);
 })[0].src.replace(/Ox\.js$/, '');
 //@ Ox.PREFIXES <[str]> <code>['K', 'M', 'G', 'T', 'P']</code>

source/Ox/js/Core.js

@@ -121,6 +121,23 @@ Ox.load = function() {
     });
 };
 
+Ox.Log = (function() {
+    var filter = /.*?/,
+        that = function() {
+            Ox.Log.log.apply(null, arguments);
+            return that;
+        };
+    that.filter = function(regexp) {
+        filter = regexp;
+    };
+    that.log = function() {
+        if (filter.test(JSON.stringify(arguments))) {
+            Ox.print.apply(null, arguments);
+        }
+    };
+    return that;
+}());
+
 /*@
 Ox.print <f> Prints its arguments to the console
     (arg, ...) -> <s> String

source/Ox/js/Request.js

@@ -79,7 +79,7 @@ Ox.loadFile = (function() {
                             element.onload = addFileToCache;
                         }                        
                     }
-                    document.getElementsByTagName('head')[0].appendChild(element);
+                    document.head.appendChild(element);
                 } else {
                     addFileToCache();
                 }