Implement support for colorful logging nearly everywhere

bob/devtools/changelog.py

bob/devtools/ci.py

bob/devtools/constants.py

bob/devtools/release.py

bob/devtools/scripts/build.py

bob/devtools/scripts/caupdate.py

bob/devtools/scripts/changelog.py

bob/devtools/scripts/ci.py

bob/devtools/scripts/commitfile.py

bob/devtools/scripts/create.py

bob/devtools/scripts/dumpsphinx.py

bob/devtools/scripts/getpath.py

bob/devtools/scripts/new.py

bob/devtools/scripts/release.py

bob/devtools/webdav3/client.py