SmartOS/live 4f998a4src/img CHANGES.md, src/img/lib/sources docker.js

add changelog, fix listing of docker tags, use joyentunsupported repo
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+6-1src/img/CHANGES.md
+2-2src/img/test/docker.test.js
+2-1src/img/lib/sources/docker.js
+10-43 files

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