Merge pull request #3779 from haukepetersen/add_lpc2387_timer

boards/avsextrem/Makefile.features

boards/avsextrem/include/board.h

boards/avsextrem/include/periph_conf.h

boards/msba2-common/lpc2387-timer3.c

boards/msba2/Makefile.features

boards/msba2/include/board.h

boards/msba2/include/periph_conf.h

boards/pttu/Makefile.features

boards/pttu/include/board.h

boards/pttu/include/periph_conf.h

cpu/lpc2387/Makefile.include

cpu/lpc2387/hwtimer_cpu.c

cpu/lpc2387/include/lpc23xx.h

cpu/lpc2387/include/periph_cpu.h

cpu/lpc2387/periph/timer.c