Subo la segunda fase de la descarga de una imagen.

 On branch repositorio
 Changes to be committed:

	modified:   CygnusCloud/database/imageRepository/imageRepositoryDB.py
	modified:   CygnusCloud/database/tests/imageRepositoryDBTests.py
	modified:   CygnusCloud/imageRepository/imageRepository.py
	modified:   CygnusCloud/testing/imageRepositoryTester.py