It seems that the mapleader has to be defined before vundle starts to load the plugins. For this reason, I moved it from yadr-keymap back into the vimrc. I'm sure it's not a big deal having the leader mapped under the "general config" instead of inside settings.
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.