Implemento el arranque leyendo un fichero de configuración.

 On branch prueba
 Changes to be committed:

	new file:   "Ficheros de configuraci\303\263n /ImageRepository_settings.conf"
	modified:   src/CygnusCloud/imageRepository/constants.py
	new file:   src/CygnusCloud/imageRepository/imageRepository.py
	renamed:    src/CygnusCloud/imageRepository/main.py -> src/CygnusCloud/imageRepository/main.old.py
	modified:   src/CygnusCloud/imageRepository/main.py