core: add `thread_get()`

Remove PID check duplication in `thread_getstatus()` and
`thread_getname()`.
Merge pull request #1580 from Kijewski/thread_get

core: add `thread_get()`
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: atmega_common: Initial import
cpu: atmega2560: Initial import
board: arduino-mega2560: Initial import
tests: blacklist board arduino-mega2560 for tests/examples that don't build
sys: conditional fixes for atmega2560

net_help: inet_pton: add conditional include of sys/types.h for atmega2560:
    Without this test/unittests fails to build due to a missing declaration of
    ssize_t
lib: add ifdef for atmega2560 to hashtable.c