Add documentation for plane, tile, stack utility functions
Deleting legacy & starting text edits
Deleting legacy images
Model overview fix & developer index edit
merge dev_4_4 -D org -I include -E exclude: PR 245 (Add note about Java UTF-8 source in Insight.)
merge dev_4_4 -D org -I include -E exclude: PR 281 (Review Matlab documentation (see #10389))
merge dev_4_4 -D org -I include -E exclude: PR 291 (Add "Link" action to permissions table and to the Key 4)
merge dev_4_4 -D org -I include -E exclude: PR 296 (Putting OME-XML formats docs into ome-docs repo)