Further dependency name updates after sbesson's review.
Additional capitalization suggested in review.
Add warning about setting the OMERO_HOME environment variable
Improve readability of paragraphs referring to OMERO_PREFIX
Restore usage of OMERO_HOME variable in OMERO.grid page
Expand exported variable and removed unclear paragraph
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)
merge dev_4_4 -D org -I include -E exclude: PR 310 (Do not expose OMERO_HOME in the doc (see #10603))
merge dev_4_4 -D org -I include -E exclude: PR 311 (Minor fixes and increasing consistency in sysadmin docs.)