Add parameters to improve Terminal rendering for 'ncurses' applications

In order to make "ncurses" applications usable in codebox terminal (on various combinations of browsers and OS), I propose these modifications of the Terminal Terminal settings:
- Add a set of fixes font to the Font setting
- Add a size parameter 
- Line height parameter

These screenshots show the benefits of these parameters on Ubuntu, Mac OS and Windows (Left pane is Codebox standard, right pane is using the new/adjusted parameters):

- Firefox on Ubuntu
![Firefox on Ubuntu](https://f.cloud.github.com/assets/544433/1947353/414886f8-8050-11e3-8df6-dddf3fdb8c76.png)

- Chrome on Mac OS
![Chrome on Mac OS](https://f.cloud.github.com/assets/544433/1947360/c7bd92c8-8050-11e3-8828-3a73f8769fdb.png)

- Firefox on Max OS
![Firefox on Max OS](https://f.cloud.github.com/assets/544433/1947358/b740636c-8050-11e3-95ae-b7fad9a7455c.png)

- Chrome on Windows 8.1
![Chrome on Windows 8.1](https://f.cloud.github.com/assets/544433/1947354/963b5e88-8050-11e3-9a98-d77d64190514.png)

Regards,