
0.5.x:

check for _merge_/_update_ failures from svn itself and die or auto revert if
modifications are detected

handle tree-roots that have been renamed automatically, right now it's
init -r<begining>:<rev before rename>; and checking out a new one and using
--ids-from

handle svn:externals better (svn 1.2.0 can ignore externals, so I may just use
that.


