Fixed #30573 -- Rephrased documentation to avoid words that minimise the involved difficulty.

This patch does not remove all occurrences of the words in question.
Rather, I went through all of the occurrences of the words listed
below, and judged if they a) suggested the reader had some kind of
knowledge/experience, and b) if they added anything of value (including
tone of voice, etc). I left most of the words alone. I looked at the
following words:

- simply/simple
- easy/easier/easiest
- obvious
- just
- merely
- straightforward
- ridiculous

Thanks to Carlton Gibson for guidance on how to approach this issue, and
to Tim Bell for providing the idea. But the enormous lion's share of
thanks go to Adam Johnson for his patient and helpful review.

docs/intro/tutorial01.txt

@@ -90,9 +90,8 @@ Let's look at what :djadmin:`startproject` created::
 
 These files are:
 
-* The outer :file:`mysite/` root directory is just a container for your
-  project. Its name doesn't matter to Django; you can rename it to anything
-  you like.
+* The outer :file:`mysite/` root directory is a container for your project. Its
+  name doesn't matter to Django; you can rename it to anything you like.
 
 * :file:`manage.py`: A command-line utility that lets you interact with this
   Django project in various ways. You can read all the details about
@@ -207,7 +206,7 @@ rather than creating directories.
 
     What's the difference between a project and an app? An app is a Web
     application that does something -- e.g., a Weblog system, a database of
-    public records or a simple poll app. A project is a collection of
+    public records or a small poll app. A project is a collection of
     configuration and apps for a particular website. A project can contain
     multiple apps. An app can be in multiple projects.