After indenting/unindenting the selected lines of code, vim deselects forcing the user to reapply the selection in order to indent multiple times. This remap fixes the problem.
We are purposefully including an older version of snipMate (0.84) from mikefarmer's repo so that it works with the long list of snippets available from the scrooloose/snippets collection. The current mainline snipMate seems to be no longer compatible with those snippets, but the scrooloose collection is still the best one to use.