Start services for deb/ubuntu

Environment: Ubuntu 14.04 inside of docker (Docker version 1.3.1, build 4e9bbfa, on LinuxMint).
O.S.: Debian or Ubuntu.
- Was added a package to be installed as prerequisite of wkhtmltopdf.
- As docker environment don't automatically initialize all of its services, was necessary start all of then before install bench, as it was made for CentOs.
![result_after_installed_bench](https://cloud.githubusercontent.com/assets/2197380/5048090/2b22bbf2-6c02-11e4-8a8d-612214a0ebda.png)