Changes

Essentially, vendor sources get tracked as top-level sources in the repository, and then our projects which depend on those sources use the svn:externals property to pull in the appropriate revision. When svn:externals are used, the original source is not ever incorporated into our tree. It is essentially a "link" into a remote SVN repository instead of a local mirror. It's preferred to load the original source to the <tt>/vendorsrc</tt> tree and use <tt>svn copy</tt> to use that code to pre-populate another location in the repository.

Use svnadmin to manipulate the repository, and when reorganizing things