Bump to 1.7.3 dev.
Let #summary_wrapper expand its height when summary line-wraps.

Remove height attribute for #summary_wrapper, so it will expand its
height when summary line-wraps.

Reviewed at http://reviews.reviewboard.org/r/3784/
Fix setting time_added when publishing a review request.

The change added to set time_added to the publish time caused the
creation time to always be the publish time for every publish, not just
the first.

We now only set this when there hasn't been any changes previously made
to the review request and it's being published the first time.
Fix a crash when the right-side diff doesn't have a header.

There was an error when parsing a diff where there were headers on the
left-hand side but not the right-hand side. The solution was found by
Ze Lin Xiao at NetApp.

Fixes bug #2876
Fix unescaping comment text in the diff viewer when the text is blank.

If the comment text was blank, we'd hit a failure when unescaping the
text. I believe this may have been a change in jquery when passing in an
empty string to html().

Now we only do the unescaping logic if the comment text is blank.

Ideally, this would use _.unescape, but we don't have a new enough
underscore.js yet.
Stop showing a console window when using cleartool on Windows 7.

When running on Windows 7 and using cleartool, a consoel window would
show up for every invocation. Switching the Popen calls to pass
shell=True prevents his from happening.

Reviewed at http://reviews.reviewboard.org/r/3804/
Rework the Mercurial version checking to not break.

The Mercurial version checking was breaking in weird ways. This change
attempts to do a better job at checking the version.

First, we use their own version() function, if available.

If we can't import that, we'll try getting __version__ again, but in a
different way. We'll import the module and not the constant within it.

If that doesn't work, or if we get a version of None, we set it to an
empty string, which will result in the 'if <= 1.2' check passing.
Release Review Board 1.7.3.
Merge branch 'release-1.7.x'