Documentation updates

README.rdoc

@@ -27,13 +27,17 @@ Backlogs needs the following gems to be installed:
 * prawn
 * nokogiri
 
+2.1 works against Redmine trunk, so follow the trunk installation
+manual found at http://www.redmine.org/wiki/redmine/RedmineInstall and
+http://www.redmine.org/wiki/redmine/HowTo_configure_Apache_to_run_Redmine
+
 = Compatibility
 
 This plugin has only been tested in the following environments:
 
 * Firefox 3.5.x Mac OS X
-* Redmine trunk (will probable become Redmine 1.x)
-* PostgreSQL 8.2.6 (Might work with other databases and version but I've not tested it fully yet)
+* Redmine trunk (will become Redmine 1.x)
+* PostgreSQL 8.2.6
 * MySQL 5.0.83
 
 = License