Create README.md

With pointers on how to use this template project

README.md

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+# A template user project for use with Chaste.
+
+**Note - you probably *don't* want to fork this on Github!**
+If you do it will stay linked to this repository, and then you won't be allowed to fork any more similar projects!
+
+Instead, select `Import repository` from the `+` menu at the top right of this page whilst logged in to your GitHub account.
+
+Paste:
+
+    https://github.com/Chaste/template_project.git
+
+as the location, give it a personalised name, and click `Begin import`.  This operation should only take a few seconds.
+
+Then see the [User Projects](https://chaste.cs.ox.ac.uk/trac/wiki/ChasteGuides/UserProjects) guide page on the Chaste wiki for more information.