NRL NDVI statistics review

* Only add positive values for the ndvi generated
* Log when statistics are corrupted
* Minor fixes on filebrowser to compatibilize the extension for destination on NRL
Destination requirements and extensions

* Reorganize destination modules on two differents (core and web extension)
* Add GeoBatchRunInfo post processor support
* Add hibernate mapping for destination migration trace tables
* Implement one post processor for destination project adding this information
* Add extra options on FileBrowserOperation, SingleFileOperation and FlowStatusOperations to show and manage this run information.
Merge pull request #18 from alediator/flow_status_extensions

Flow status extensions