added possibilty to import openwsn stack as external module
fixes to fit the new silence flag
make script more verbose and deal with CRLF line endings
added vtimer test case
added a README with compatibility information
fixing bug: don't reapply patch
fix regression from #251

remove thread_measure_stack_usage from kernel_internal.h again
thread_measure_stack_usage documentation

fix documentation - the return value is the opposite of what it said
add and improve comments
renamed space to space_free (the name is documentation as well)
thread_measure_stack_ usage -> free

Rename the function as its name suggests the opposite of what it does.
fix stack_size comment in ps.c
Merge pull request #518 from LudwigOrtmann/thread_measure_stack

Thread measure stack: usage => free
Merge pull request #510 from mehlis/test_vtimer_msg

added vtimer test case
fixes downloading the archive with each ```make -B```
fixes naming conflict with uart.(c|h)
fix for those fancy case sensitiv filesystems
Merge pull request #508 from thomaseichinger/openwsn-pkg

support openwsn as a pkg
trickle: replace call to pow (base of 2)
Merge pull request #523 from mehlis/trickle

trickle: replace call to pow (base of 2)