Merge branch 'docs/add-links' into 'develop'

Minor documentation improvements

See merge request !965

docs/CONFIGURATION.md

 # Pleroma-FE configuration and customization for instance administrators
 
-* *For user configuration, see USER_GUIDE.md*
-* *For local development server configuration, see HACKING.md*
+* *For user configuration, see [Pleroma-FE user guide](USER_GUIDE.md)*
+* *For local development server configuration, see [Hacking, tweaking, contributing](HACKING.md)*
 
 ## Where configuration is stored
 

docs/USER_GUIDE.md

+# Pleroma-FE user guide
+
 > Be prepared for breaking changes, unexpected behavior and this user guide becoming obsolete and wrong.
 
 > If there was no insanity
@@ -6,8 +8,6 @@
 >
 > --Catbag
 
-# Pleroma-FE user guide
-
 Pleroma-FE user interface is modeled after Qvitter which is modeled after older Twitter design. It provides a simple 2-column interface for microblogging. While being simple by default it also provides many powerful customization options.
 
 ## Posting, reading, basic functions.