Use options object in open method
Use options object in open method

Available open options:
options.flags: see fs.open flags
options.mode: see fs.open mode
options.create: create file if failed to open with flag 'r+'

Signed-off-by: Harri Kovalainen <2ecf1d4f49b9d136d53b819dc389c152487e9e18@gmail.com>

hakovala/node-bin-file