Merge branch 'rf23x' into rf23x-inga

Conflicts:
	apps/webserver-nano/httpd-cgi.c
	cpu/avr/dev/rf23x/rf23x.c
	cpu/avr/radio/hal.c
	cpu/avr/radio/hal.h
[dev/rf23x] fixed usage in platform/inga/
[dev/rf23x/rf231] Added rf231+ specific features (aes + random) as a module
Merge branch 'rf23x' into rf23x-inga
[platform/inga] activated rf231+ specific features for inga
[platform/inga] Added example for inga how to use AES and random