move config into config dir

nodewatcher/files/etc/config/nodewatcher

+config 'script'
+        option 'version' '30'
+	option 'error_level' '0'
+	option 'logfile' '/var/log/nodewatcher.log'
+	option 'data_file' '/tmp/node.data'
+
+config 'network'
+	option 'mesh_interface' 'br-client'
+	option 'client_interfaces' 'eth0 wlan0'