Fixed error output on rbt setup-repo when writing .reviewboardrc fails.

This is a trivial fix to include both formatting arguments when
displaying an error after failing to write .reviewboardrc. Previously,
the arguments weren't wrapped in a tuple.
Release RBTools 0.5.4.
Allow for using repository names with Subversion repositories in 0.5.x.

Repository names for Subversion repositories broke Subversion. On
0.5.x, the name is stuffed into the repository_url setting, which the
Subversion code assumes means we're operating on some possibly remote
repository.

The proper fix to separate out repository names and URLs is coming in
0.6, but for now, we check the repository_url whenever we use it to see
whether it's a URL or a name.

This is intended to stay only on the 0.5.x branch, and will not merge to
master.
Add --svn-show-copies-as-adds to post-review.

This option was added to rbt post but not post-review, but unfortunately the
backend didn't know that. There's no reason to not have it in post-review, for
people who still need to use that for some reason or other.