Debian package rebuild instructions.

Shows a user how to make their own Debian packages from Git. Also has
instructions for getting official upstream builds for their distro.

packaging/debian/README.md

@@ -0,0 +1,23 @@
+# How to compile a Deb package
+
+Use these instructions to build your own Deb package from your local sources.
+For the latest official packages go to [Debian](http://packages.debian.org/arduino-mk)
+or [Ubuntu](https://launchpad.net/ubuntu/+source/arduino-mk) or use apt.
+
+First install the dependencies as root:
+
+    apt-get build-dep arduino-mk
+    apt-get install arduino-core libdevice-serialport-perl help2man build-essential dpkg-dev
+
+Fetch the Debian source:
+
+    apt-get source arduino-mk
+
+Make any local changes to want within arduino-mk-* directory and update the package version:
+
+    cd arduino-mk-*
+    dch -i
+
+Then compile. This will create a binary Deb:
+
+    dpkg-buildpackage -b