better explain createjs templates customization

Author: dbu

bundles/create/introduction.rst

@@ -340,8 +340,8 @@ is allowed to edit according to
 The JavaScript loader also parametrizes the configuration for create.js and
 WYSIWYG editor.
 
-Alternatively, you can of course use your own templates to include the assets
-needed by create.js.
+If you need to include the assets for create.js in a different way, you will
+need to write your own templates and include those instead.
 
 In the page header, include the base CSS files (and add your own CSS files
 after those to be able to customize as needed) with:
@@ -512,13 +512,13 @@ reads like this:
 
     All of these issues will hopefully be fixed in later versions if people
     step up and contribute pull requests.
-    
-In some cases you may need to use a property type multiple times (e.g. your 
-text property for some reason consists of 3 columns) and you want your 
+
+In some cases you may need to use a property type multiple times (e.g. your
+text property for some reason consists of 3 columns) and you want your
 RDF data to be semantically correct.
 
-While sending changed data via REST api, CreateJS uses RDF property names 
-(and not the identifiers) to distinguish values, so you should use 
+While sending changed data via REST api, CreateJS uses RDF property names
+(and not the identifiers) to distinguish values, so you should use
 subsets for generic property names:
 
 .. code-block:: xml
@@ -535,8 +535,8 @@ subsets for generic property names:
         </children>
     </type>
 
-Otherwise, CreatePHP will not be able to determine which property has 
-been changed and it can lead to unexpected behaviors such as 
+Otherwise, CreatePHP will not be able to determine which property has
+been changed and it can lead to unexpected behaviors such as
 overwriting contents of all elements using the same property name.
 
 Mapping Requests to Domain Objects