[SVN] r2244

[Chris Thomas]

> Subversion repository browser plugin; work in progress.

This is intended to support a Subversion bundle command such as  
"Reveal (Active File) in Repository".

What works:
Browsing works. The command line tool will bring up a new browser at  
a given URL when the plugin is installed. There is also some editing  
functionality in place. You can perform "svn cp" by drag and drop,  
and "svn mkdir" using the context menu.

Not implemented:
svn mv
renames
property editing
info
log
...

Also:
(1) The UI is not nearly polished enough, and given the imminent  
release of 1.1, I don't think it's a good idea to rush it. For now,  
I'm checking it in for safekeeping. Feedback is welcome, and code  
contributions doubly so!

(2) It sublaunches the svn command-line tool to do the actual work.  
It would be faster and more flexible to use the SVN client libraries  
directly, but it would complicate a lot of configuration-related stuff.

Chris