[SQUASH ME] added fixed speed values
[SQUASH ME] removed UNDEFINED from device list
[SQUASH ME] fixed signature of spi_transfer_reg()
[SQUASH ME] added begin_transaction, fixed doc
Fix a few cppcheck findings
Reset udoo's MCU before flashing
Merge pull request #1472 from LudwigOrtmann/cpp-check-a-bit

Fix a few cppcheck findings
boards/chronos: clean up display driver a bit

reduce scope of variables
remove useless comments and spaces

saves 2 bytes =)
native: uart reconnect buffer replay

When using socket stdio, add option to replay what has been written to
stdout while not connected (`-r`).

The implementation is to simply use the existing log file (which is
implicitly created when the option is used), and read from it until
EOF upon reconnect.

closes #476
native: cleanup

fix style
fix some syscall declarations
reorder syscall declarations
init syscalls in dedicated function
substitute 1 with EXIT_FAILURE
Merge pull request #1445 from LudwigOrtmann/issue-476

native: uart reconnect buffer replay (+a little cleanup)
make: fix buildsizes* targets

also ignore BOARD_INSUFFICIENT_RAM boards
unify/make work BOARD filter
Merge pull request #1403 from LudwigOrtmann/transceiver_fixup

sys/transcevier: fix more loop integers
native: increase rtc realism

Prevent rtc enabling when not initialized.
drivers: added servo motor driver
Merge pull request #1468 from haukepetersen/add_driver_servo

drivers: added servo motor driver
Merge pull request #1380 from rousselk/arduino-due-minor-fixes

Reset ARM Cortex-M3 MCUs before flashing
drivers: some improvements to the ADC driver IF

- removed UNDEFINED value from device enum
- added pre-defined precision values
- added power[on|off] functions
- some minor doxygen fixes
boards/arduino-due: some cleanup

- added parenthesis for LED macros
- changed mapping for LED_* to LED_RED_*
- removed some old values from periph_conf.h
boards/udoo: cleanup in periph_conf.h

- removed unused defines