svn verify: use a custom editor and get_revision() Previously, we would fetch each file in the revision/changeset individually. With this change, we fetch the entire revision in one request, and use a custom editor to verify its contents. This is quite a lot faster than the previous means when verifying over the internet. By an order of magnitude or two, in fact. As data is transfered in a single operation, verifying a revision from PyPy took 30 seconds rather than 30 minutes, and saturated my 10Mbps connection. Please note that the output ordering isn't stable between the two; output will appear in reverse order when using the fast verifier.

97f2079e3778511944ffb6a662520580650a3993 1.0
09c016174e332eceda015d3f43d96d7e0228acf3 1.0.1
4359ddd73b009fbb356c52ea5d99cba25222ee7a 1.1
8e621dbb82d4363a85317638ad237e2817c56347 1.1.1
093ae2915b452539b44390ee4ea14987484e1eee 1.1.2
708234ad6c97fb52417e0b46a86c8373e25123a5 1.2
4bbc6bf947f56a92e95a04a27b94a9f72d5482d7 1.2.1
0cbf9fd89672e73165e1bb4db1ec8f7f65b95c94 1.3
07234759a3f750029ccaa001837d42fa12dd33ee 1.4