[NEXUS-5736] Move tracking of existing priv ids
add DM for p2 repo plugins bundle zip
drop DM for bundle, use nexus.version instead for stupid env plugin
some more docs
use root project for docs
Merge branch 'master' into NEXUS-5736-track-priv-id-post-validation
Merge pull request #16 from sonatype/NEXUS-5736-track-priv-id-post-validation

REVIEW: move priv id tracking post validation