Tried to get everything to an rc.0 of the very latest version,
which required some research in some cases about the published
versions. For example, some packages had version histories like:
```
...
1.0.3-winr.2 January 20th, 2015
1.0.3-winr.3 February 24th, 2015 installed
1.0.3 March 17th, 2015 installed
1.0.4-anubhav.0 August 6th, 2015
1.0.4-plugins.0 July 22nd, 2015
1.0.5-galaxy.0 July 17th, 2015
```
In this case, I would bump the version from `1.0.4-plugins.0`
to `1.0.5-rc.0`, skipping `1.0.4`.
This included removing some internal version constraints. It would be
nice if package A could say "use B@2.0.0" (when both have changed), but
when they're both in the release, we need to make a release that has a
B@2.0.0-rc in it, which doesn't match that constraint. Fortunately,
constraints aren't necessary within a release anyway.
