- Makefile.base: Respect ARFLAGS when building static archives.
 - Makefile.cflags: Add default ARFLAGS.
 - Makefile.vars: Add description for ARFLAGS.

llvm-ar does not understand `-rc`, but works for creating empty
archives when called with `rc` (without the leading dash). BSD `ar`
which ships with OSX, which the test is written for, understands the
argument with or without the leading dash (but does not support creating
empty archives.)

examples/rpl_udp: added the explicit default values as values to the README.md

rpl: added configurable RPL MOP on compile time

     - e.g. `make RPL_MOP=RPL_MOP_NON_STORING_MODE`
     - changed the MOP defines to have `RPL_MOP_*` prefix

examples/rpl_udp: changed printing the actual set channel

Support for Freescale Kinetis MCUs, kinetis_common

Update CMSIS HAL to version 4.0

  add peripheral drivers for Freescale Kinetis MCUs:
    adc driver
    cpuid driver
    gpio driver
    hwtimer_arch driver (hwtimer used Low Power Timer)
    i2c driver (master mode only)
    mcg driver
    pwm driver
    random_rnga driver
    random_rngb driver
    rtc driver
    spi driver
    timer driver (timer used Periodic Interrupt Timer)
    uart driver
  add doc.txt (configuration examples)

  random_rnga: Update RNGA driver in preparation for RNGB driver.
  random_rngb: Add RNGB driver.
  spi: refactor SPI to work for multiple CTARS, add spi_acquire, spi_release
  gpio: Add gpio_irq_enable, gpio_irq_disable. Refactor GPIO.
  gpio: Add gpio_irq_enable, gpio_irq_disable.
  gpio: Refactor ISR functions to work with all GPIOs (0-31) and all ports (PORTA-PORTH)
  adc: Refactor ADC, add calibration and scaling.
    Added integer scaling of results in adc_map.
    Handle precision setting in adc_init.
    Set ADC clock divider depending on module clock.
    Add ADC_1 as a possible device.
    Add ADC calibration procedure according to K60 ref manual.
    Handle ADC pins which are not part of the pin function mux.
Signed-off-by: Joakim Gebart <joakim.gebart@eistec.se>

and go

sys/bloom: changed doc from bytes -> bits

rpl: Fix for wrong length in DAO options, leads to error in package length (visible via wireshark)

rpl: wrong length of DIO options

Currently, the DIO options `dodag conf` and `prefix info` are off by two
bytes in their `length` field. The RFC states, that the length field
should not include the option `type` field and the `length` field (two bytes).

For Prefix Info Option: Option Length: 30 (RFC 6550, P.61)
For Dodag Conf  Option: Option Length: 14 (RFC 6550, P.52)

Wireshark complains about DIOs as malformed packets, otherwise.
Can be reproduced by running the rpl_udp example and logging the DIOs
via wireshark.

remove common globals for rpl with regard to #2346

examples/rpl_udp: README fixes

stm32f0: Remove Doxygen from already documented functions.

Makefile.cflags: Make -fno-common the default

board/stm32f0discovery: switched to OpenOCD

boards/stm32f3discovery: use OpenOCD for flashing, debugging and resetting

switched flashing and debug scripts to use OpenOCD

Fix misc errors that occur with ENABLE_DEBUG

I enabled debug output in all files to poke around
and there were some errors (seemingly) due to code
changes that were not tested with debug enabled. This
commits tries to fix these issues.

board/stm32f4discovery: optimized openocd script

removed redundant flash erase (speeds up flashing quite a bit)