make: added CPU_MODEL & TERMFLAGS to Makefile.vars

- added CPU_MODEL variable
- added TERMFLAGS variable
- fixed a little style (dots on the end of comments)
Merge pull request #1591 from haukepetersen/fix_make_vars

make: added CPU_MODEL & TERMFLAGS to Makefile.vars
board/pca10000: added make targets

- added `reset` target
- added `debug` target
- added `debug-server` target
- adjusted `flash` target
Merge pull request #1590 from haukepetersen/fix_nrf_maketargets

board/pca10000: added make targets
examples/ccn-lite-relay: remove unnecessary USEMODULE
Merge pull request #1592 from thomaseichinger/ccn-lite-relay-rtc

examples/ccn-lite-relay: remove unnecessary USEMODULE
cpu: initial import of stm32f1
boards: initial import of iot-lab_M3
at86rf231: introduce variable to keep internal driver state

The at86rf231 radio transceiver provides one IRQ (TRX_END) signaling
end of transmission or reception but no way to distinguish between
these.
stm32f1: implement missing UART0 parts
iot-lab_M3: refactor at86rf231 driver
stm32f1: implement SPI register access functions
at86rf231: handle rx tx state changes correctly
stm32f1: implement new cpuid_get
stm32f1: SPI: implement speed setting properly