Update readme with information on changes

README.rst

@@ -22,6 +22,36 @@ https://github.com/brownan/Minecraft-Overviewer/wiki/Documentation
 To contact the developers and other users, go to the site at the top of this
 README, or go to #overviewer on irc.freenode.net.
 
+### Additional Features
+
+A configurable north direction! I'm not a big fan of north pointing to the
+bottom left corner of the screen, and I bet you aren't either. So here you go!
+Either use the commandline option --north-direction, or use the option
+north_direction in the settings file. Valid options are 'lower-left',
+'upper-left', 'upper-right', and 'lower-right'. I'm partial to 'upper-right',
+myself.
+
+### Additional Bugs
+
+With very small testing maps, the upper-right direction seems to exacerbate an
+existing bug that will not let you click on a sign in some cases. This is a
+bang-head-on-desk sort of thing, I should be able to find it but I cannot.
+Somehow it does seem to work fine on my actual SMP map, but there is a good
+chance that is just luck.
+
+Some blocks don't rotate properly in the upper-left and lower-right directions.
+This is an easy fix, it just takes time. And besides, the upper-right is what
+you are really looking for, anyway. Probably.
+
+It's slow! One of the rotation methods is very, very inefficient. It needs to be
+rewritten, but I don't seem to be smart enough to do it right now. I must
+investigate! No hard numbers but I will run a benchmark soon.
+
+### Upstream
+
+Once I've squashed some bugs and cleaned up the code a bit, I will see about
+getting this included in the official Minecraft Overviewer.
+
 Features
 ========