Tidying script docs & using git links
Simplifying git link
Mark's suggestions
Further editing of GitHub app ref
Whitespace & fixes from 554
Remove duplicate entries for "blitz" component.

The same item is listed twice in the list of what is in a binary
distribution of OMERO.
Merge pull request #563 from jballanc/dedup_build_components

Remove duplicate entries for "blitz" component.
merge dev_4_4 -D org -I include -E exclude: PR 559 (remind that model changes may affect IceMapper (rebased))
merge dev_4_4 -D org -I include -E exclude: PR 560 (Adding ILdap as requested by Ola)
merge dev_4_4 -D org -I include -E exclude: PR 562 (Tidying script docs & using git links (rebased onto dev_4_4))