Fit projects to sixlowpan refactoring
use RIOT submodule and fix an include for the default project
use RIOT submodule and fixed output of hello-world project
use config only for MSBA2 in default project
changed transceiver for default-native to nativenet
use submodule and fixed LED control in hello-world-blinker
use RIOT submodule for tlayer project
use RIOT submodule for sixlowpan project
adapted to current RIOT version