Image/png add to proxy types.

Changes on proxy.properties to make it compatoble with PrintSnapshot requests.
Merge pull request #324 from alediator/minor_fix

Image/png add to proxy types.
Update the project to the 1.6-SNAPSHOT version
Fix URLs on site
Merge pull request #327 from alediator/site_minor_fix

Fix URLs on site
#305, added new params for geostore url injection.