- reorganized the file structure to be able to easily branch both core and 
  image
- delete the documentation in the image project, it's now only in core
- also recognize begin metafile with a long form command
- be less restrictive when identifying the begin metafile command: ignore the 
  parameter list length completely
- added service providers for the XML graphics preloader and loader factory
- case 3184092: integrated patch by clivebutler to allow setting the image size via standard ImageParam methods