GWTII-4: pass correct locale to server (for print legend title).
Schowcase application: enable nl locale and set en default.
Dependency server project to snapshot.
GWTII-4: properties file for dutch messages
Merge pull request #95 from geomajas/GWTII-4_printPluginLocaleToServer

GWTII-4: pass correct locale to server (for print legend title).