Added form_errors partial and usage text

lib/generators/simple_form_haml/USAGE

@@ -1,8 +1,20 @@
 Description:
-    Explain the generator
+    This generator creates haml views for use with the simple_form gem
+    by Plataforma Tec. It also uses the show_for gem for displaying
+    model attributes in the show.html.haml that it generates.
+
+    Before you can use this generator you need to install both gems:
+
+    gem install simple_form
+    gem install show_for
 
 Example:
-    rails generate simple_form_haml Thing
-
+    rails generate simple_form_haml:scaffold Thing
+    
     This will create:
-        what/will/it/create
+        app/views/things/index.html.haml
+        app/views/things/edit.html.haml
+        app/views/things/show.html.haml
+        app/views/things/new.html.haml
+        app/views/things/_form.html.haml
+        app/views/shared/_form_errors.html.haml

lib/generators/simple_form_haml/scaffold/scaffold_generator.rb

@@ -12,6 +12,11 @@ def copy_layout_file
                  File.join("app/views/layouts", controller_class_path, "#{controller_file_name}.html.haml")
       end
 
+      def copy_shared_files
+        template "_form_errors.haml.erb",
+                 File.join("app/views/shared", "_form_errors.html.haml")
+      end
+
       def copy_view_files
         views = available_views
         views.delete("index") if options[:singleton]

lib/generators/simple_form_haml/scaffold/templates/_form.haml.erb

@@ -1,8 +1,9 @@
 - simple_form_for @<%= singular_name %> do |form|
-  = render 'form_errors'
+  = render :partial => 'shared/form_errors', :locals => { :resource => @<%= singular_name %> }
 
 <%- for attribute in attributes -%>
   = form.input :<%= attribute.name %>, :label => '<%= attribute.name.titleize %>'
 <%- end -%>
+
   .actions
     = form.button :submit

lib/generators/simple_form_haml/scaffold/templates/_form_errors.haml.erb

@@ -1,6 +1,6 @@
--if @<%= singular_name %>.errors.any?
+-if resource.errors.any?
   #errorExplanation
-    %h2= "#{pluralize(@<%= singular_name %>.errors.count, "error")} prohibited this <%= singular_name %> from being saved:"
+    %h2= "#{pluralize(resource.errors.count, "error")} prohibited this #{resource.class.name.titleize} from being saved:"
     %ul
-      - @<%= singular_name %>.errors.full_messages.each do |msg|
-        %li= msg
+      - resource.errors.full_messages.each do |msg|
+        %li= msg

lib/generators/simple_form_haml/scaffold/templates/show.haml.erb

@@ -1,6 +1,6 @@
 %h1 <%= singular_name %>
 
-- show_for @<%= singular_name %> do |a| %>
+- show_for @<%= singular_name %> do |a|
 <%- for attribute in attributes -%>
   = a.attribute :<%= attribute.name %>
 <%- end -%>