Add support for iTerm2's Tmux integration

This should resolve #52.

README.md

@@ -202,6 +202,22 @@ any reason you need to disable it, just set `$TMUXIFIER_NO_COMPLETE`.
 export TMUXIFIER_NO_COMPLETE=1
 ```
 
+## Tips
+
+### iTerm2 Integration
+
+Tmuxifier supports iTerm2's [Tmux integration][]. It can be used in two ways:
+
+- Passing `-CC` as a second argument to the `load-session` command. For
+example:
+
+        tmuxifier load-session my-awesome-session -CC
+
+- Setting the `TMUXIFIER_TMUX_ITERM_ATTACH` environment variable to `-CC`
+  before calling the `load-session` command.
+
+[tmux integration]: https://code.google.com/p/iterm2/wiki/TmuxIntegration
+
 ## Inspiration
 
 - Tmuxifier is largely inspired by [Tmuxinator][].

lib/layout-helpers.sh

@@ -323,7 +323,8 @@ __get_current_window_index() {
 
 __go_to_session() {
   if [ -z "$TMUX" ]; then
-    tmuxifier-tmux -u attach-session -t "$session:"
+    tmuxifier-tmux $TMUXIFIER_TMUX_ITERM_ATTACH -u \
+      attach-session -t "$session:"
   else
     tmuxifier-tmux -u switch-client -t "$session:"
   fi

libexec/tmuxifier-load-session

@@ -7,7 +7,7 @@ source "$TMUXIFIER/lib/util.sh"
 
 # Provide tmuxifier help
 if calling-help "$@"; then
-  echo "usage: tmuxifier load-session <layout_name | file_path>
+  echo "usage: tmuxifier load-session <layout_name | file_path> [<iterm mode>]
 
 Aliases: session, ses, s
 
@@ -30,5 +30,9 @@ fi
 # Load runtime functions.
 source "$TMUXIFIER/lib/runtime.sh"
 
+if [ "$2" == "-CC" ]; then
+  export TMUXIFIER_TMUX_ITERM_ATTACH="-CC"
+fi
+
 # Load session file.
 load_session "$1"