Add tmuxifier via git submodule

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "private"]
   path = private
   url = git@bitbucket.org:jimeh/dotfiles-private.git
+[submodule "shell/tmux/tmuxifier"]
+  path = shell/tmux/tmuxifier
+  url = git@github.com:jimeh/tmuxifier.git

shell/tmux.sh

@@ -8,3 +8,13 @@ alias tml="tm ls"
 if [ -f "/usr/local/etc/bash_completion.d/tmux" ]; then
   source "/usr/local/etc/bash_completion.d/tmux"
 fi
+
+# Tmuxifier
+export TMUXIFIER="$DOTSHELL/tmux/tmuxifier"
+export TMUXIFIER_LAYOUT_PATH="$DOTFILES/private/tmux-layouts"
+
+[[ -s "$TMUXIFIER/init.sh" ]] && source "$TMUXIFIER/init.sh"
+
+alias m="tmuxifier"
+alias ms="tmuxifier load-session"
+alias mw="tmuxifier load-window"