Memory bug fixes

* Avoid return whole page uploading files
 * Add rest path to the operation engine controller
 * Modify file browser controller to skip innecesary operations
* Fix old upload method using the new service.
* Review upload functionalities
 * Fixed OO exception bug
 * Delegate it on file upload service
 * Changes on related operations to adapt it to the new service
* Use disk storage for the file upload
* Fix log libraries
* File appender logger by default
* Upload files fixes
 * Review this functionality to remove complete/incomplete uploaded files from memory
 * Delegated on ControllerUtils
 * Add scheduled task to clean incomplete uploads

All from the working branch, and:

commit 192dfa4bd42944966ca006ddab98669adbf629a3
Author: Mauro Bartolomeoli <maurobartolomeoli@gmail.com>
Date:   Mon Feb 24 18:27:14 2014 +0100

    changed sl4j-log4j12 scope