make Makefile verbose by default to see compile errors
FIXME: finish/test || usart1 test
(FIXME) test usart with cpp templates

FIXME: refactor snode.h || refacotring to c++ templates
make absolutely sure that those are compile time constants
enable some undocumented g++ optimizations for less code size

We don't need RTTI and exception handling, we only want our templates to be
evaluated at compile time. With this patch, code size is about the same as with
plain C defines.

Thanks to @Drogglbecher, who pointed me at the Wiselib Makefile:
https://github.com/ibr-alg/wiselib/blob/master/apps/iapps/wiselib_example/Makefile.msp430#L31