Considerable cleanup of installation docs

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Changelog
 
-## Evennia 1.0 (2019-) (develop branch, WIP)
+### Evennia 1.0
+
+> Not released yet
+> 2019-2022 develop branch (WIP)
 
 Up requirements to Django 4.0+, Twisted 22+, Python 3.9 or 3.10
 
@@ -144,10 +147,11 @@ Up requirements to Django 4.0+, Twisted 22+, Python 3.9 or 3.10
   on location for easy use in game dir.
 
 
-### Evennia 0.9.5 (2019-2020)
+## Evennia 0.9.5
 
-Released 2020-11-14.
-A transitional release, including new doc system.
+> 2019-2020
+> Released 2020-11-14.
+> Transitional release, including new doc system.
 
 Backported from develop: Python 3.8, 3.9 support. Django 3.2+ support, Twisted 21+ support.
 
@@ -234,8 +238,10 @@ without arguments starts a full interactive Python console.
   `INPUT_CLEANUP_BYPASS_PERMISSIONS` is a list of perms that bypass this safety stripping.
 - Make default `set` and `examine` commands aware of Attribute categories.
 
+## Evennia 0.9
 
-## Evennia 0.9 (2018-2019)
+> 2018-2019
+> Released Oct 2019
 
 ### Distribution
 
@@ -433,7 +439,10 @@ without arguments starts a full interactive Python console.
 - Simplified chinese, courtesy of user MaxAlex.
 
 
-## Evennia 0.8 (2018)
+## Evennia 0.8
+
+> 2017-2018
+> Released Nov 2018
 
 ### Requirements
 
@@ -560,7 +569,9 @@ without arguments starts a full interactive Python console.
 
 - Polish translation by user ogotai
 
-# Overviews
+# Overview-Changelogs
+
+> These are changelogs from a time before we used formal version numbers.
 
 ## Sept 2017:
 Release of Evennia 0.7; upgrade to Django 1.11, change 'Player' to
@@ -682,24 +693,9 @@ to Events, Commands and Permissions.
 Griatch takes over Maintainership of the Evennia project from
 the original creator Greg Taylor.
 
-(Earlier revisions, with previous maintainer, go back to 2005)
+# Older
 
+Earlier revisions, with previous maintainer, used SVN on Google Code
+and have no changelogs.
 
-# Contact, Support and Development
-
-Make a post to the mailing list or chat us up on IRC. We also have a
-bug tracker if you want to report bugs. Finally, if you are willing to
-help with the code work, we much appreciate all help!  Visit either of
-the following resources:
-
-* Evennia Webpage
-  http://evennia.com
-* Evennia manual (wiki)
-  https://github.com/evennia/evennia/wiki
-* Evennia Code Page (See INSTALL text for installation)
-  https://github.com/evennia/evennia
-* Bug tracker
-  https://github.com/evennia/evennia/issues
-* IRC channel
-  visit channel #evennia on irc.freenode.com
-  or the webclient: http://tinyurl.com/evchat
+First commit (Evennia's birthday) was November 20, 2006.