Update project libraries, update build.gradle, remove sample images

added iconSelector, removed extra files

added maxWidth() parameter (to be used with large images in order to prevent freezing)

Added ability to set form of images (separately for header (is useFirstAsHeader == true) and other photos), you can use IMAGE_FORM_SQUARE (square photo, as used before, used as default form) or IMAGE_FORM_HALF_HEIGHT (full width and half height)

Added ability to use resources for photos and to use square photos;