README.txt: added as per cboltzs subtle irc hint

git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@877 a1433add-5e2c-0410-b055-b7f2511e0802

debian/README.txt

@@ -0,0 +1,14 @@
+Random instructions for help:
+
+
+This 'debian' directory is used by dpkg-buildpackage when creating a .deb.
+
+If you wish to do it yourself, please try the following from within the trunk directory.
+
+1. Update debian/changelog; include your email address in the last change
+
+2. dpkg-buildpackage -rfakeroot .
+
+3. Look in ../ at the shiny .deb / .tar.gz
+
+4. Profit.