Replace '-' with '_' in BOARD and CPU_… macros
Fix BOARD macro
removing possible invalid check

Checking for a link local address to determine if a node is on-link is
probably not a valid assumption in most wireless networks.
native profiling support

only works with Linux for now
change target name, add cachegrind target
rebase_fixup
make: streamline native targets

The new target names are easier to remember / decipher:

term
term-cachegrind
term-gprof
term-valgrind

all
all-cachegrind
all-gprof
all-valgrind
all-debug

eval-gprof
eval-cachegrind
add variables for gprof, cg_annotate
native: don't use RIOT read/write in UART
Prepend path to dependency info files with sed

The old way was error prone due to it's use of a fixed path file and
confusing.

closes #775
pipe through sed instead

addresses: https://github.com/RIOT-OS/RIOT/pull/778#discussion_r10041955
change new/overlooked Makefiles
remove some newlines
make: Add DEFAULT_MODULE and DISABLE_MODULE

Closes #926
Add DISABLE_MODULE test
Add DISABLE_MODULE += auto_init to tests
Fixup for #798
Merge pull request #940 from Kijewski/issue-926

make: Add DEFAULT_MODULE and DISABLE_MODULE
examples/rpl_udp: use defaulttransceiver
Added standard way to query CCA status on CC2420 transceiver (squashed)