implement tag number support to widget

bump api ver to 2

sources/extsysmon/scripts/get-external-ip.desktop

@@ -8,4 +8,5 @@ X-AW-Active=true
 X-AW-Output=true
 X-AW-Redirect=nothing
 X-AW-Interval=1
-X-AW-ApiVersion=1
+X-AW-ApiVersion=2
+X-AW-Number=0

sources/extsysmon/scripts/script-template.desktop

@@ -1,20 +0,0 @@
-[Desktop Entry]
-Encoding=UTF-8
-Name=aw-script-template
-Comment=Template for external script
-# path to command
-Exec=/path/to/some/command
-# usually you need to leave this field blank
-# use this field to setup script language for example
-X-AW-Prefix=/prefix/to/command/if/required
-# is the script active. true or false
-X-AW-Active=false
-# is the script has output. true or false
-X-AW-Output=false
-# use redirect for the script
-# stderr2stdout, nothing, stdout2stderr
-X-AW-Redirect=nothing
-# update interval in default AW intervals
-X-AW-Interval=1
-# API version
-X-AW-ApiVersion=1