Implementing installer. 

- Utility/Installer.php is the class that will handle all the installation process.
- installPage.tpl is the page showed when databaseConfig.php is not found.
- index.php was edited to avoid include errors. They were generated from the require_once "".
Setted container width to 70%.
Merge branch 'master' of https://github.com/davcri/Unibox-Ajax