Command line interface

[hi-a]

Updated the tool's command interface

fcwt> help
Usage:
    help|connect|info|shutter|focus-unlock
    increment|decrement TARGET
    set TARGET VALUE1 [VALUE2]
    stream [cv]
TARGET:
    iso:           takes an integer value (e.g. 200)
    f-number:      takes a float value (e.g. 3.5)
    focus-point:   takes a pair of values denoting the focus point coordinates X and Y (e.g. 5 5)
    shutter-speed: takes a value of the form N/M or N (e.g. 1/20, 3)
    exposure-compensation:
                   takes a float value (e.g. 1.3)
    white-balance|film-simulation|self-timer|flash:
                   takes an integer value. Value is one of the values in camera properties

Opening this PR so that this can get more testing till we iron out most of the lurking bugs

[FearL0rd]

Can I part a command line with the executable?
example: fuji_cam_wifi_tool -connect - shutter.