Reset the SAM3X8E before flashing
so as to avoid some hangups in the flashing process
sys/transcevier: fix more loop integers
native: clean up and clarify help

- reorder option details to mirror the order given in usage
- list option arguments in option details
- clarify option arguments
Merge pull request #1459 from LudwigOrtmann/native_help

native: clean up and clarify help
drivers: Initial import of SPI low-level driver IF
drivers: fixes to the SPI low-level interface
driver: updated SPI driver interface
[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