FIXES on Bootstrap and Path classes

1. On bootstrap class, was added static declaration for registerClass() method
2. On Patch class was removed at top the loadClass('system') call, because this make a redeclaration error, in PHP ver 5.3.2x
   and it was moved into function that use that, now it is just loaded conditionally.

gulliver/system/class.bootstrap.php

@@ -60,7 +60,7 @@ class Bootstrap
         return false;
     }
 
-    public function registerClass($classname, $includeFile)
+    public static function registerClass($classname, $includeFile)
     {
         BootStrap::$includeClassPaths[strtolower($classname)] = $includeFile;
         return;

workflow/engine/classes/class.patch.php

@@ -2,7 +2,6 @@
 
 G::LoadClass("Task");
 G::LoadClass("TaskUser");
-G::LoadClass("System");
 
 /**
  * class, helping to set some not desirable settings but necesary
@@ -26,6 +25,10 @@ class p11835 extends patch
      */
     static public function isApplicable()
     {
+        if (! class_exists('System')) {
+            G::LoadClass("System");
+        }
+
         patch::$isPathchable = false;
         $con = Propel::getConnection("workflow");
         $stmt = $con->prepareStatement("describe TASK;");