[env] Comma-separate list of superclasses in RST interface-reference report.
Merge pull request #572 from cgay/library-report

[env] Comma-separate list of superclasses in RST interface-reference report.
Merge pull request #570 from cgay/compiler-verbose-flag

Add a -verbose flag to dylan-compiler.
Untabify
[system] Add {current,parent}-process-id
Merge pull request #573 from cgay/system

[system] Add {current,parent}-process-id
Revert "Merge pull request #570 from cgay/compiler-verbose-flag"

This reverts commit f66ca483bdea653fb8d8dd3ddcd29cd237e05644, reversing
changes made to 514ef125cb0b39efffcb2923f15e7ecf884d9066.
[duim,gtk] Stub implementation of note-focus-in.
Document logging library.
Merge pull request #574 from cgay/docs

Document logging library.
Document logging library, part deux.
Add a release note about current-process-id.
Merge pull request #575 from cgay/docs

More logging docs + a release note.
[doc,library] Move logging and strings doc to own directory.
[doc,logging] Use Dylan code blocks.
[doc,logging] Cleanup formatting, add links.
[lib] Add logging library as submodule.
Merge pull request #577 from cgay/dev

[lib] Add logging library as submodule.
Add release note about logging library.
Add registry entry for logging library.