One thing I've been noticing is that due to the size of this repo, svn/sourceforge often fails checking out the entire repo at once via "svn checkout". This is a known problem with sourceforge/svn:
https://stackoverflow.com/questions/27267742/why-do-i-get-svn-e120106-ra-serf-the-server-sent-a-truncated-http-response-b
There's a few unsatisfying hacks to getting this to work (you basically have to re-run the checkout, clean and update it over and over again until it completes).
One question I have is whether you would be willing to either move this codebase to github or, alternatively, mirror the repo in both locations (sourceforge and github). Just a suggestion!
I think that moving to GitHub is the plan that Ft. Collins is working toward. Maybe they could comment next week...
Only the trunk needs to be checked out in order to do builds. Checking out the entire repository includes all of the branches, each of which contains a copy of the files in trunk. I've updated the DownloadingSourceCode wiki to indicate that only the trunk should be checked out.
There is a plan to eventually move to GitHub, as it has been identified as our corporate repository, but there are no immediate plans for when that will be started.