Issue 2: Support pegging revisions
Project Member Reported by d.seym...@gmail.com, May 7, 2008
SVN allows us to peg to a revision.. we should support it through the ivyconf.

Its probably not really in line with Ivy as a whole.. but, I've often seen
someone modify one of my thirdparty artifacts to require some new
dependency that wasnt a dependency for me.. that adds something that puts
me into jar hell. So, I'd like to add the feature.