Support title stacking (CSI 22 t/CSI 23 t)
Merge github.com:gnachman/iTerm2 into feature_title_stacking
Fix stupid messaging errors
Add test script for title stacking
Remove some redundant nil checking
Merge pull request #102 from saitoha/feature_title_stacking

Support Title Stacking (CSI 22 t / CSI 23 t)