Started on a raspberry plugin
Delete __init__.py.save

deleted .save file
updated makefiles
terminate plugin processes on exit, drop privs after double fork
feeder_rev can be written
fixed typo
calculate rpm and capacity / rev
menutags from plugins
tag filtering implemented
working tags and descriptions
Setting values written to values.conf in plugin directory
chown values.conf file to conf.USER if set
write one undefined value to rrd when counter restarts to prevent huge bars in barchart
typo prevented graph drawing
Calculate power_kW from pellet fed last 5 minutes
Merge branch 'feature/raspberry_gpio_plugin' into develop