[WIP] `tmux` colour configuration:

see: [solarized/tmux at master · altercation/solarized](https://github.com/altercation/solarized/tree/master/tmux)
`tmux` colour configuration.

See: [solarized/tmux at master · altercation/solarized](https://github.com/altercation/solarized/tree/master/tmux)
Merge pull request #27 from kazu634/tmux-solarized-colour

`tmux` colour configuration: