Use ['load'] instead of .load to avoid conflicts with other #load met…

…hod definitions

In Rails 3 master.load was giving exception "ArgumentError: wrong number of arguments (0 for 1)" - it seems that somehow different #load method definition was called before method_missing which handles dynamic properties.

lib/envjs/runtime.rb

@@ -274,7 +274,7 @@ def self.extended object
 
       inner.load = lambda { |*files|
         files.each do |f|
-          master.load.call f, inner
+          master['load'].call f, inner
         end
       }
 
@@ -322,7 +322,7 @@ def self.extended object
         outer[k] = v
       end
 
-      master.load.call Envjs::EVENT_LOOP, global
+      master['load'].call Envjs::EVENT_LOOP, global
 
       static = new_global
 
@@ -334,10 +334,10 @@ def self.extended object
 
       # fake it ...
       static["isInner"] = true
-      master.load.call Envjs::STATIC, static
+      master['load'].call Envjs::STATIC, static
       master["static"] = static
 
-      master.load.call Envjs::ENVJS, inner
+      master['load'].call Envjs::ENVJS, inner
 
       inner = nil
     end