update to contiki 2.6
update to new contiki

also reenable the deprecated clock_delay function, since we need it. for
now.
update usb stick, too
remove mDNS resonder

it hasn't been doing anything except littering the network with useless
packet since our switch to site-local multicast
deduplicate provisioning app
deduplicate button handling code
really deduplicate button handling code
disable RPL routing on sockets for now
remove mdns_responder from makefile
remove statemachine upload code from webserver
random delay on reply-to-broadcast-query (see #137)
Merge branch 'development' into bl-hexinfo
remove forwarding flag getting/setting code
device name now read from EEPROM
output device name in HBA code
forwarding of device names from hba code to binary
Merge branch 'bl-hbcomp' into bl-hexinfo
uploading of device names to eeprom
ability to leave device name unchanged - fixed #142
issue #142 - now it works