Merge pull request #44 from roxit/ubuntu-tmux

Add tmux 1.8 installation instructions for Ubuntu 12.04/12.10/13.04.

v0.1.0rc6 - add window_index option from stratoukos.

rc4. New example for focusing panes. Fix bug where focus: pane would …

…break when loading with tmux session.

Fix #23 where workspaces would not build with a non-default (non 0) p…

…ane-base-index.