clean up old and unused files

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
bsp/*/config: harmonize system.tpl

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
flash_tools: remove old dir300/fonera tools

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
bsp/def/network.sh: use restart and wait before reading macs

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
configurator/nodewatcher/wlanwatchdog: only run when system is ready

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>