update README
update README
Update README.md
Update README.md
Update README.md

Add -Pmultiple2repo profile to doc
Update README.md

Add -Pmultiple2repo and -Dmirror-target-to-repo.includeSources=true
update README.md from 4.40.x branch
JBIDE-17519 link to script verifyTarget.sh; migrate from md to adoc
JBIDE-17519 move details about building and updating TPs to https://github.com/jbosstools/jbosstools-devdoc/blob/master/building/target_platforms/target_platforms_updates.adoc and link to it from here