added raspimjpeg v4.2.1; lots of NULL initialization and NULL checks; start_all()/stop_all() create/cleanup the same stuff
added raspimjpeg v4.2.1; lots of NULL initialization and NULL checks; start_all()/stop_all() create/cleanup the same stuff

konstantinj/RPi_Cam_Web_Interface,konstantinj/RPi_Cam_Web_Interface,konstantinj/RPi_Cam_Web_Interface,konstantinj/RPi_Cam_Web_Interface,silvanmelchior/RPi_Cam_Web_Interface,silvanmelchior/RPi_Cam_Web_Interface,silvanmelchior/RPi_Cam_Web_Interface,silvanmelchior/RPi_Cam_Web_Interface,silvanmelchior/RPi_Cam_Web_Interface