squash: driver: fixed typo to pass doccheck
squash: driver: bug fixes after test
squash: adapted Makefiles for correct build behaviour
restructured, no spi interaction in isr anymore
major bugfixes and restructurization
comments addressed
introduce new netconf option, ..AUTOCCA
squash: minor bugfix and add auto-init mechanism
squash: minor fixes to make travis happy
The rational is that for devices with dual addressing modes (or more) as
for example IEEE 802.15.4 you can get or set these addressing modes for
the source address of a packet. The length of the destination address is clear
since it usually arrives through the `ng_netif_hdr_t`.
In case of IEEE 802.15.4 this is needed to determine the compression
state of source IPv6 addresses in 6LoWPAN IPHC.
