Added still image command

[QuantumEntangledAndy]

This is a simple command that will grab the video stream and convert it to a single jpeg image

usage:

neolink image --config=config.toml --finename=filepath CameraName

Implements #28

[QuantumEntangledAndy]

Also fixes a bug in mediaStream where recieving a non media stream packet will pause the stream indefinitly

[dkerr64]

Thanks. This will help me. Unfortunately I am still stuck at the login not working yet so can't test.

[QuantumEntangledAndy]

Login should be fixed for aes now