User operation extension.

* Add new type of operation called UserOperation that uses user logged to obtain a different directory to work by each user
* Add support for this operation on all GeoBatch operations and on utilities class
* Use it also from filebrowser operation (file browser also allow to be configured as user operation)
* Change destination properties to use those extensions
Merge pull request #20 from alediator/folder_by_user

User operation extension.