Several bugfixes

README.markdown

@@ -57,7 +57,7 @@ Thrid shows the 2d table for variant choosing.
 ## Instalation
 
 For git users:
-<code>git submodule add git://github.com/swistak/spree-enchanced-option-types.git vendor/enchanced_option_types</code>
+<code>git submodule add git://github.com/swistak/spree-enchanced-option-types.git vendor/extensions/enchanced_option_types</code>
 
 for others (or git users that don't like submodules):
 <code>ruby script/extension install git://github.com/swistak/spree-enchanced-option-types.git</code>

app/models/option_value_decorator.rb

@@ -1,5 +1,5 @@
 OptionValue.class_eval do
-  validates_numericality_of :amount
+  validates_numericality_of :amount, :allow_nil => true
 
   after_update :adjust_variant_prices, :if => :amount_changed?
 

app/views/products/_eot_includes.html.erb

@@ -20,4 +20,4 @@ end
   And if you really really really want to please make sure they are wrapped into
   document ready event (it's not needed here as we put script AFTER everything we need is in DOM and loaded)
 %>
-<script type="text/javascript" src="/javascripts/enchanced-option-types.js"></script>
+<%= javascript_include_tag('enchanced-option-types.js') %>

enchanced_option_types_extension.rb

@@ -16,8 +16,8 @@ def activate
     base = File.dirname(__FILE__)
     Dir.glob(File.join(base, "app/**/*_decorator.rb")){|c| load(c)}
 
-    FileUtils.cp Dir.glob(File.join(base, "public/stylesheets/*.css")), File.join(RAILS_ROOT, "public/stylesheets/")
-    FileUtils.cp Dir.glob(File.join(base, "public/javascripts/*.js")), File.join(RAILS_ROOT, "public/javascripts")
+#    FileUtils.cp Dir.glob(File.join(base, "public/stylesheets/*.css")), File.join(RAILS_ROOT, "public/stylesheets/")
+#    FileUtils.cp Dir.glob(File.join(base, "public/javascripts/*.js")), File.join(RAILS_ROOT, "public/javascripts")
 
     # make your helper avaliable in all views
     Spree::BaseController.class_eval do