installation script for OS Devuan (#95)

* adding devuan

* add devaun desc to README
make update and upgrade more noisy
correct path for devuan in pre-install

* some untested code for the source install - source installation is broken in Debian installation script and I have not debugged the problem. Focusing on the packaged version first.

devuan/resources/switch/package-all.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+#move to script directory so all relative paths work
+cd "$(dirname "$0")"
+
+#includes
+. ../config.sh
+. ../colors.sh
+. ../environment.sh
+. ../arguments.sh
+
+apt-get -q update && apt-get install -y -q ntp curl memcached haveged
+
+if [ ."$cpu_architecture" = ."arm" ]; then
+        echo "deb http://repo.sip247.com/debian/freeswitch-stable-armhf/ jessie main" > /etc/apt/sources.list.d/freeswitch.list
+        curl http://repo.sip247.com/debian/sip247.com.gpg.key | apt-key add -
+else
+        echo "deb http://files.freeswitch.org/repo/deb/freeswitch-1.6/ jessie main" > /etc/apt/sources.list.d/freeswitch.list
+        curl http://files.freeswitch.org/repo/deb/freeswitch-1.6/key.gpg | apt-key add -
+fi
+apt-get -q update && apt-get install -y -q freeswitch-meta-all freeswitch-all-dbg gdb