[ADF-4152] Updated folder structure of core docs (#4415)

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Manual fixes to core doc file links

* [ADF-4152] Further automatic + manual link tidying

docs/core/services/page-title.service.md

@@ -0,0 +1,31 @@
+---
+Title: Page Title service
+Added: v2.0.0
+Status: Active
+Last reviewed: 2018-11-19
+---
+
+# [Page Title service](../../../lib/core/services/page-title.service.ts "Defined in page-title.service.ts")
+
+Sets the page title.
+
+## Class members
+
+### Methods
+
+-   **setTitle**(value: `string` = `""`)<br/>
+    Sets the page title.
+    -   _value:_ `string`  - The new title
+
+## Details
+
+If an application name is supplied in the app config file then this will
+be concatenated with the `value` parameter when `setTitle` is called, giving
+a result of the form "PageName - AppName" (see
+[App Config service](app-config.service.md) for more information). If `value`
+is not supplied then just the app name is used; this will default to
+"Alfresco ADF Application" when no app name set in the config file.
+
+## See also
+
+-   [App config service](app-config.service.md)