Add a README and move things around a bit.

debian/README

@@ -0,0 +1,15 @@
+This package exists to house Ubuntu's settings for the Calamares installer.
+
+If you want to add a new package for your flavor, here's how to do it:
+ 1. Create a new top-level directory (like Lubuntu's, you could just copy
+    theirs and customize).
+ 2. Edit files and rename the branding directory for your flavor. All of the
+    configuration files are pretty self-explanatory, but they're documented
+    well upstream, so it shouldn't be hard to put your own spin on things.
+ 3. Create a new binary package, and *make sure to Conflicts against all other
+    binary packages in this source package*. This needs to be done because all
+    subdirectories are installed in the same location, so this makes sure that
+    nobody tries to install any two binary packages at the same time.
+
+That's about it. If you have any questions, feel free to email Simon Quigley
+at tsimonq2@ubuntu.com or consult the upstream documentation.

debian/calamares-settings-lubuntu.install

@@ -1 +1 @@
-etc/*
+lubuntu/* etc/calamares/