Add licenseagreement example

Add dedicated example showing how to ask for a license agreement.

Change-Id: I42144fcd38fcde3e8018c1d4559847fc83854499
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Rename settings in config.xml file

Rename UninstallerName to MaintenanceToolName
(change its default value to "maintenancetool").
Rename UninstallerIniFile to MaintenanceToolIniFile.

Change-Id: Ic8ceae80b43c6793ae9b0baacea2ea374a0f90d1
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>