Add release note about user-registry-path.  Other minor edits.
Merge pull request #404 from cgay/dev

Add release note about user-registry-path.  Other minor edits.
Format warnings in a way compatible with Unix tools.
Add a release note about compiler warnings format change.
Merge pull request #408 from cgay/warnings

Format warnings in a way compatible with Unix tools.
[doc] Add a relese note about join method documentation creation.