sys/vtimer: spin on short duration in vtimer_sleep

closes #571
board/flash: changing flashrom_write signature

	→ changing all flashrom_write() function to the same signature
	→ adding const keyword to signature
dist/pyterm: enable unicode decoding

use unicode streamreader on serial interface
fixes #1371
pnet: Fix INADDR_ANY and INADDR_BROADCAST

INADDR_ANY and INADDR_BROADCAST should not be initializers.
Merge pull request #1414 from sgso/fix-inaddr_any

pnet: Fix INADDR_ANY and INADDR_BROADCAST
sys/shell: fix error when not using sixlowpan

```
/sys/shell/commands/sc_net_if.c:631:27: error: ‘IPV6_MAX_ADDR_STR_LEN’ undeclared (first use in this function)
             char addr_str[IPV6_MAX_ADDR_STR_LEN];
                           ^
```
make: model net_if dependency on net_help
make: replace spaces with tabs in Makefile.dep
vtimer: renamed e|dINT to disable|restoreIRQ
Merge pull request #931 from haukepetersen/vtimer_irq_fix

vtimer: renamed eINT to enableIRQ
Merge pull request #1401 from LudwigOrtmann/scnetif_error

sys/net_if, make: fixup
tests,examples: remove unneeded headers, fix style
pkg/libcoap: fix copmilation problems

Apparently all that whitespace was needed after all.
Next convert to new-style function declrations.
Also, don't prevent make from noticing a failing patch.
tests: add libcoap compilation test
Merge pull request #1347 from SGSSGene/cleanup_signature_fix

unification of flash write signature
Merge pull request #1429 from LudwigOrtmann/libcoap-fixup

pkg/libcoap: fix build AND tests: add one to ensure it does not break in the future
Merge pull request #1381 from LudwigOrtmann/issue-1371

dist/pyterm: enable unicode decoding
Merge pull request #1430 from LudwigOrtmann/test-cleaning

tests,examples: remove unneeded headers, fix style
board: Initial import of stm32f0discovery
cpu: Initial import of cortex-m0_common