[maven-release-plugin] prepare for next development iteration
(Partially) fixed flashing of TelosB devices (#143)

Flashing now works smoothly. Unfortunately, some internal driver stuff is messed up and it is currently necessary to disconnect and reconnect with a new driver instance in order not to get scrambled data streams from the device :(
Bumbed version number to 1.1.6-SNAPSHOT to be on par with wsn-device-utils
Updated plugin deps and removed unused Maven extension for SSH upload
[maven-release-plugin] prepare release v1.1.6