examples: Added JavaScript gpio tool
examples: Added JavaScript gpio tool

Signed-off-by: Henry Bruce <57ea958cad66de244404958c9a01f7a4ad51b29e@intel.com>

sergev/mraa,spitfire88/mraa,alext-mkrs/mraa,Jon-ICS/mraa,stefan-andritoiu/mraa,arunlee77/mraa,stefan-andritoiu/mraa,KurtE/mraa,sergev/mraa,g-vidal/mraa,andreivasiliu2211/mraa,whbruce/mraa,whbruce/mraa,petreeftime/mraa,yongli3/mraa,intel-iot-devkit/mraa,ncrastanaren/mraa,KurtE/mraa,alext-mkrs/mraa,w4ilun/mraa,malikabhi05/mraa,sergev/mraa,arfoll/mraa,alext-mkrs/mraa,arfoll/mraa,jontrulson/mraa,petreeftime/mraa,alext-mkrs/mraa,arfoll/mraa,ProfFan/mraa,arunlee77/mraa,g-vidal/mraa,petreeftime/mraa,Pillar1989/mraa,yongli3/mraa,g-vidal/mraa,arunlee77/mraa,Pillar1989/mraa,Pillar1989/mraa,w4ilun/mraa,w4ilun/mraa,alext-mkrs/mraa,Jon-ICS/mraa,intel-iot-devkit/mraa,Propanu/mraa,stefan-andritoiu/mraa-gpio-chardev,KurtE/mraa,andreivasiliu2211/mraa,KurtE/mraa,Propanu/mraa,jontrulson/mraa,ncrastanaren/mraa,ProfFan/mraa,whbruce/mraa,ncrastanaren/mraa,ProfFan/mraa,petreeftime/mraa,sergev/mraa,Propanu/mraa,malikabhi05/mraa,stefan-andritoiu/mraa,KurtE/mraa,spitfire88/mraa,jontrulson/mraa,arfoll/mraa,yongli3/mraa,stefan-andritoiu/mraa,arfoll/mraa,arunlee77/mraa,jontrulson/mraa,ProfFan/mraa,Jon-ICS/mraa,sergev/mraa,Hbrinj/mraa,malikabhi05/mraa,spitfire88/mraa,intel-iot-devkit/mraa,stefan-andritoiu/mraa-gpio-chardev,yongli3/mraa,Propanu/mraa,Propanu/mraa,intel-iot-devkit/mraa,jontrulson/mraa,Hbrinj/mraa,Hbrinj/mraa,stefan-andritoiu/mraa-gpio-chardev,stefan-andritoiu/mraa,yongli3/mraa,malikabhi05/mraa,stefan-andritoiu/mraa-gpio-chardev,whbruce/mraa,ncrastanaren/mraa,malikabhi05/mraa,andreivasiliu2211/mraa,ncrastanaren/mraa,spitfire88/mraa,stefan-andritoiu/mraa-gpio-chardev,andreivasiliu2211/mraa,g-vidal/mraa,g-vidal/mraa,intel-iot-devkit/mraa,w4ilun/mraa,Hbrinj/mraa