Added build info to README...

README.md

@@ -2,3 +2,18 @@
 
 A desktop application firewall for Subgraph OS.
 
+## Building
+
+
+```
+	# To build the Debian package:
+	git clone -b debian https://github.com/subgraph/fw-daemon.git
+	cd fw-daemon
+	# To buiild the latest tag
+	gbp buildpackage -us -uc
+	# To build from stable
+	gbp buildpackage -us -uc --git-upstream-tree=master
+	# Install the package
+	dpkg -i /tmp/build-area/fw-daemon{,-gnome}-*.deb
+	# Refresh your gnome-shell session 'alt-r' type 'r' hit enter.
+```