Updated the MSP430 hwtimer implementation, to cope with the lack of consistency
of of TI with the TimerX register names.
Added mising reference to cpu/msp430-common/include/cpu.h
so as to get the needed definition of F_RC_OSCILLATOR
Added missing definition of 'PRIu32' in some RIOT include files
to avoid a bug in mspgcc's standard library
fixed debug output for ps and vtimer
shell: refactor default shell command handling

before, we actually duplicated code for handling of shell commands
supplied to shell_init and those hardcoded by MODULE_SHELL_COMMANDS.

This patch refactors shell.c find_handler and print_help so there's
no duplicated code.
fixed byte order in reception of IEEE802.15.4 frames according to the fixed sending in f6c37b0b4fab35ab50aa9095f1c584fb74f92d0a
changed ktimer to hwtimer in the avsextrem smb380 driver
Merge pull request #319 from haukepetersen/avsextrem-smb380-fix

Fixed old ktimer references in the avsextrem smb380 driver
make system calls safer/clean up headers

wrap some libc functions that do system calls (terminal output)
wrap read/write with syscall guard
define real_read/write (next dynamic linker find for read/write)
guard system calls in remaining code
introduce native_internhal.h
throw out some debug statements that break things
clean up includes a bit
declare board_init in native_internhal.h
add -ldl to LINKFLAGS for cpu/syscalls
fix race in thread_yield, cpu_switch_context_exit

call *context only with interrupts disabled, use isr trampoline for
this if necessary
disable interrupts for sighnd ctx switch
cope with SIGIO behaviour

SIGIO appears to be edge triggered, therefore we need to read
continuously until no more data is available
pre-init native hwtimer

make it behaver more like a regular timer
Merge pull request #323 from LudwigOrtmann/native_fixes

Native fixes
add lpm syscall barrier for native w/out UART
Merge pull request #325 from LudwigOrtmann/native_no-uart_syscall_barrier

add lpm syscall barrier for native w/out UART
Merge pull request #297 from OlegHahm/debug_fixes

fixed debug output for ps and vtimer
shell: dont't use malloc on each line
clean up shell
added some debug output for the network stack