Merge pull request #21 from afabiani/master

- indexes 3 and 4 legends
Merge branch 'master' of https://github.com/geosolutions-it/soil_sealing
Merge pull request #22 from afabiani/master

 - soilsealing WFS logging
Merge branch 'master' of https://github.com/geosolutions-it/soil_sealing
 - delete tx listener fix