Finish data extraction from Fao Excel files

I've tried to make it as generic as possible to adapt it easily to the
possible excel files
Update configuration.ini

Update organization logo
Adapt importer to the new model
Merge branch 'develop-importerFAOAgriculturalCensues' of https://github.com/weso/landportal-importers into develop-importerFAOAgriculturalCensues
Fix problem with years representation
Add historical mode
Fix historical mode
Improve errors control

Clean unused code
Add ini file update
Add support for easier command execution
Add translated organization descriptions
Add support to multiple files
Unify names
Add adecuated organization id
Fix id actualization
Update configuration.ini

Add all available translations in the document
Fix field in configuration.ini
Merge remote-tracking branch 'origin/develop-importerFAOAgriculturalCensues' into develop