safeguard intrinsics.h include since it is only provided by msp430-gcc >= 4.6
Merge pull request #530 from thomaseichinger/msp430-intrinsics.h-fix

safeguard intrinsics.h include in lpm_cpu.c
improve test_hwtimer usefulness

make the delays noticeable for humans
use HWTIMER_TICKS macro for platform independency
substitute folder with directory
Merge pull request #544 from LudwigOrtmann/folder2directory

substitute folder with directory
increase inter-timer delay
Merge pull request #546 from LudwigOrtmann/test_hwtimer

improve test_hwtimer usefulness