IPHONE-176: First go at the image cache, with implementation of core features and tests to validate them.
Must review a bit the documentation and implement more advanced features.
IPHONE-176: Fixed tests and code to really use given cache folder and not hardcode to the iOS console image cache folder
IPHONE-176: Implemented test and code for fogetAllImages
IPHONE-176: A bit of cleaning and using image instead of resource naming