[WIP] CLI Manager

CentralReport is designed to be easier as possible and friendly. The configuration is stored in a file (/etc/centralreport/centralreport.cfg) and can be edited with a text editor.

This pull request adds a "CLI Manager". This manager is a friendly way to configure and to manage your CentralReport software. The Manager will be able to :
- [ ] Check the daemon status and the processus ID (PID)
- [ ] Start or stop the daemon
- [ ] Edit the web server port for the "Standalone app"
- [ ] Edit the account token (CentralReport Online)

This manager will be called during the installation (except if the installer runs with the '-s' option) and asks the "mode":
![cli 1](https://f.cloud.github.com/assets/1638158/808485/2d13cca6-ee65-11e2-8a71-045e5899625c.png)

And corresponding options:
![cli 2](https://f.cloud.github.com/assets/1638158/808490/37af5a2c-ee65-11e2-88ac-2a7e107ba400.png)

This Manager uses the **Urwid library** (http://excess.org/urwid/). This library is very powerful and so easy. In the future, we can imagine lots of new functions with this library (get stats in the CLI like htop? configure more options?).