Merge pull request #69 from ipa-josh/groovy_dev

Update and fixes
fixed import
Merge branch 'groovy_dev' of https://github.com/ipa320/seneka_sensor_node into groovy_dev
Merge branch 'groovy_dev' of https://github.com/ipa-josh/seneka_sensor_node into groovy_dev
updated extend/retract serv.
added test flag
set to "stop"-value
added button
some config
check valid.