Actually commit new INSTALL.md

INSTALL.md

+# Pre-requisites #
+
+If you want to build the manpage, you will need ronn. Newer versions of Debian come with a package:
+
+    apt-get install ruby-ronn
+
+
+# Installing #
+
+    sudo make install
+
+
+# Uninstalling #
+
+    sudo make uninstall
+
+There is another, more thorough, version. Just make sure you are not running this when you have installed to an important directory which is empty, otherwise.
+
+**THIS WILL DELETE /usr/local IF YOU INSTALLED THERE AND IT'S EMPTY, OTHERWISE**
+
+    sudo make purge
+
+**THIS WILL DELETE /usr/local IF YOU INSTALLED THERE AND IT'S EMPTY, OTHERWISE**
+
+This is not in the default behaviour of `make uninstall` for obvious reasons.
+
+
+# Other stuff #
+
+To clean up the generated manpag, run
+
+    make clean
+
+and if you are bored, I suggest
+
+    make moo