BUG: fix get_installed_vcs such as most recent versions are the first ones.
BUG: fix get_installed_vcs such as most recent versions are the first ones.

git-svn-id: 7892167f69f80ee5d3024affce49f20c74bcb41d@4445 fdb21ef1-2011-0410-befe-b5e4ea1792b1

azverkan/scons,azverkan/scons,azverkan/scons,azverkan/scons,azverkan/scons