make: Add target to show if boards that are supported by apps
[SQUASH ME] make: move info-boards-supported to Makefile.buildtests
make: Add info prefix for non-building targets in Makefile.buildtests
[SQUASH ME] make: Add info prefix for non-building targets in Makefile.buildtests
[SQUASH ME] Fix some error + simplify some calls
drivers/at86rf231: add transceiver/pid includes
Merge pull request #1567 from LudwigOrtmann/at86rf231_includes

drivers/at86rf231: add transceiver/pid includes
pyterm: Use only printf-style String Formatting

Needed for backwards compatibility to python 2.6. Refers to
https://github.com/RIOT-OS/RIOT/commit/46c38230ebb7cbc690ac77d1b649e29c536f1d0c#commitcomment-7363298
Merge pull request #1568 from authmillenon/pyterm-printf-style

pyterm: Use only printf-style String Formatting
pyterm: adds timer function

/timer <interval> <command> now allows to schedule arbitrary commands to
be send to the node after the specified interval (in seconds).
Merge pull request #1569 from OlegHahm/pyterm_timer

pyterm: adds timer function
make: Make BOARDS a global macro for buildtests
[SQUASH ME] make: info-boards-supported is just
make: Add supported boards to info-build target
[SQUASH ME] make: remove debugging lines
[SQUASH ME] make: Move buildtest related PHONY targets to Makefile.buildtests
Merge pull request #1557 from authmillenon/make-list-show

make: Add target to show if boards that are supported by apps
native: remove redeclarations of sched_active_thread
Merge pull request #1574 from Kijewski/native-sched_active_thread

native: remove redeclarations of sched_active_thread
board/stm32f3discover: fixed LED macros