[Merge] lp:~mvo/ubuntu-release-upgrader/text-install-progress into lp:ubuntu-release-upgrader

[Brian Murray]

The file README.devel actually contains a typo or two in that it mentions ubuntu-release-upgrade not ubuntu-release-upgrader.
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https://code.launchpad.net/~mvo/ubuntu-release-upgrader/text-install-progress/+merge/176872
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