wrap im_*merge() as a class
im_*merge() class wrapper works
wrap im_*mosaic() as classes
vips_mosaic() outputs mosaic params
wrap im_match*() as a class
more hackery
match works
wrap im_global_balance*() as a class
wrap im_remosaic() as a class
redo im_*mosaic1() as classes
redo im_*merge1() as classes
fix up global balance names

track mosaic-name now
finish mosaicing rewrite