describe new model graph traversal work for developers
adjust for latest graph traversal changes
adjustments to new graph traversal for developers

suggested by @joshmoore, @hflynn, @pwalczysko, @bpindelski
re-wrap paragraph
add overview box

suggested by @hflynn
add note about order of rule matching
small changes suggested by @ximenesuk
remove the text about removing the omero.* logging filter

https://github.com/mtbc/openmicroscopy/commit/3dc00624
adopt @pwalczysko's "my" suggestion
rewrap paragraph
adjust wording re. inadvertent deletion

inspired by @pwalczysko
minor rewording re. thumbnails possessing pixels
clarify confusing image/pixel sentence
Merge pull request #1042 from mtbc/trac-11779-graphs

document graph traversal reimplementation for developers
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