Patch to add support for Raspberry Pi CPU Temp

Raspberry Pi has a cpu temperature value available at /sys/class/thermal/thermal_zone0/temp, the value must be divided by 1000 for the temperature in celsius.

Tested on a Raspberry Pi 3, but sys class value dates back to 2013 (Raspberry Pi 1) and should run on all RPis.

The attached patch adds this value to /usr/lib/byobu/cpu_temp... (also attached as a file)

--- /usr/lib/byobu/cpu_temp 2016-05-30 12:24:12.267170477 -0400
+++ /usr/lib/byobu/cpu_temp 2016-05-30 12:25:59.836096951 -0400
@@ -21,7 +21,7 @@

 __cpu_temp_detail() {
        local i
- for i in $MONITORED_TEMP /sys/class/hwmon/hwmon*/device/temp*_input /sys/class/hwmon/hwmon*/temp*_input /proc/acpi/ibm/thermal /proc/acpi/thermal_zone/*/temperature; do
+ for i in $MONITORED_TEMP /sys/class/hwmon/hwmon*/device/temp*_input /sys/class/hwmon/hwmon*/temp*_input /proc/acpi/ibm/thermal /proc/acpi/thermal_zone/*/temperature /sys/class/thermal/thermal_zone*/temp; do
                [ -r "$i" ] || continue
                printf "%s\n" "$i:"
                cat "$i"/*
@@ -30,9 +30,9 @@

 __cpu_temp() {
        local i t unit
- for i in $MONITORED_TEMP /sys/class/hwmon/hwmon*/device/temp*_input /sys/class/hwmon/hwmon*/temp*_input /proc/acpi/ibm/thermal /proc/acpi/thermal_zone/*/temperature; do
+ for i in $MONITORED_TEMP /sys/class/hwmon/hwmon*/device/temp*_input /sys/class/hwmon/hwmon*/temp*_input /proc/acpi/ibm/thermal /proc/acpi/thermal_zone/*/temperature /sys/class/thermal/thermal_zone*/temp; do
                case "$i" in
- *temp*_input)
+ *temp*_input|*thermal_zone*/temp)
                                [ -s "$i" ] && read t < "$i" && t=$(($t/1000))
                        ;;
                        *)