unittests: separate test suites from main.c

native: fixup #1145: function declaration

examples: added README.md to ipc_pingpong example

pkg: openwsn: update with iot-lab_M3 support and split patch files

into separate patch files

sys/crypo: fix function declarations

In #1119 old-style function declarations are exterminated and forbidden.
I missed the functions in `sys/crypto` because they weren't used
throughout the tests/examples before #1124.

Exterminate old-style function definitions

sys:crypto: put ciphers into one module

This change removes the need to patch the main.c if you add or remove a
test suite. A test suite in `tests/unittests/tests-XXX` needs to export
the function `void tests_XXX(void)`, which gets called by `main()`.

The `tests-XXX/Makefile` looks like your average module:
```
MODULE = tests-XXX
include $(RIOTBASE)/Makefile.base
```

unittests: use subfolders for different tests

Unittests for e.g. different libraries can be put into
`tests/unittests/tests-XXX`, where `XXX` is your test suite.

If `unittests` is made with `make all` (or any explicit argument), then
all test suites get built. If you use `make tests-XXX tests-YYY …` then
only the test suites `XXX` and `YYY` get built.

unittests: exit(1) or error

sam3x8e: fix license to LGPL

added missing Licence in at86rf231 driver files.

dist/tools: Licensing the border router

license: fix license header grammar

fixes #1155 needs @haukepetersen to review

mc1322x: redbee-econotag: fix licenses to LGPL

native: refactor getpid calls

insert missing "is"

board: Initial import of the arduino-due

- switched to flashing using the programming port
- fixed Makefile.include
- fixes some documentation

- removed newlib nano.specs

- added OSX flashing support

- fixed flasher and port for OSX

- fixed port on OSX

- fixed bossac linux tool

- added license header

- fixed spelling in uart driver
- marked cortexm-common a phony target
- fixed Makefiles
- added reboot interface implementation
- fixed documentation

- added UART0_BUFSIZE define

- added license header

- fixed documentation issues

- fixes to cortexm-common
- Added ARM CMSIS headers to cortexm_common
- thread_exit fixes to cortexm-common
- cortexm-common adjusted documentation

- cortexm_common added eINT dINT defines for now

core: doc: documentation improvement lifo.h lpm.h msg.h mutex.h

license: %s/FeuerWare/RIOT/g