- start of external Imager API access:

- start of external Imager API access:
  - rename headers to avoid conflicts:
    - image.h to imager.h
    - imagei.h to imageri.h
    - datatypes.h to imdatatypes.h
    - config.h to imconfig.h (created by Makefile.PL)
  - moved all public types defined in imager.h to imdatatypes.h
  - supply the PM parameter to WriteMakefile(), to install headers
    under Imager/include, and the Imager typemap in Imager/typemap.
    We scan the MANIFEST for files to add to PM.
  - add "i_" prefix on some functions useful as public at the C level.
  - moved the typedefs that support the typemap from Imager.xs to
    imperl.h
  - set the global callbacks hook in the Imager.xs BOOT section
  - API cleanup:
    - define i_tags_set(), i_tags_setn() - we might not allow multiple
      values for a tag in the future
    - i_copy() now returns a new image instead of doing horrible inplace
      things to an existing image
    - provide actual functions for all of the macros we define in imager.h
      so we can put them in the global callbacks structure
  - define global functions structure (imexttypes.h)
    and initialize it (imext.c)
  - add API include header with macros to setup the define and
    initialize the local callbacks pointer, and macros to call the API
    functions.
  - build Imager::APIRef from C sources, including updating the sources
    to include documentation for each API function.
  - convert dyntest and mandelbrot dynfilts into XS modules (too easy)
  - simple Imager::CountColor example
- support Inline::C :
  - typemap changes to accept Imager or Imager::ImgRaw objects as
    image parameters
  - define Imager output type for trivial cases of returning an i_img as
    a full Imager object
  - Inline WITH hook to filter Imager XS types into types Inline::C can
    accept, supply appropriate headers and initialization.
  - test script t/t82inline.t
- try to use XSLoader instead of DynaLoader (but fallback if necessary)
- paste() can now paste a subset of the source image.
- paste() now has better tests
- paste() should now be faster for larger pastes