Consolidated template and page-type docs

- Removed duplicated content from page-type-templates (was more or less a variation of the content in templates.md)
- Removed built-in page-controls, which was a bit of a dumping ground for unconnected topics.
  Moved the majority to page-type-templates
- Removed all recipes from "sitetree" docs, since they were outdated or hacky (like grouping of records, or implementing custom *children() method on subclasses)
- Added pagination, escaping, base_tag, CurrentMember to template docs
- Removed default_parent docs from SiteTree, as this setting doesn't have any effect looking at core

docs/en/howto/pagination.md

@@ -21,6 +21,10 @@ information.
 		return new PaginatedList(Page::get(), $this->request);
 	}
 
+Note that the concept of "pages" used in pagination does not necessarily
+mean that we're dealing with `Page` classes, its just a term to describe
+a sub-collection of the list.
+
 ## Setting Up The Template
 
 Now all that remains is to render this list into a template, along with pagination

docs/en/reference/restfulservice.md

@@ -167,7 +167,7 @@ Put something like this code in mysite/code/Page.php inside class Page_Controlle
 		}
 
 
-Put something like this code in mysite/templates/Layout/HomePage.ss:
+Put something like this code in `themes/<your-theme>/templates/Layout/HomePage.ss`:
 
 	:::ss
 	<h3>My Latest Del.icio.us Links</h3>

docs/en/reference/siteconfig.md

@@ -1,4 +1,4 @@
-# SiteConfig
+# SiteConfig: Global database content
 
 ## Introduction