Add WMS thumbnail maker panel to editor.

This panel is added to the popup which allows to add thumbnail by URL or Upload.
A new mode is added providing a map with the background layer and all WMS layers registered
in the metadata record. User can choose a layout, a scale and an area of interest
in order to print the map in PNG format and attach it to the current metadata record.

Changes:
* Update MapFish print to 2.0 version
* Move MapFish print module configuration and resources file to WEB-INF/config-print (instead of webapp root folder)
* Add layout and PDF template for printing thumbnail
Merge remote-tracking branch 'upstream/develop' into feature/wms-thumbnail-maker
Move to print-lib 2.0.0.
Merge remote-tracking branch 'upstream/develop' into feature/wms-thumbnail-maker
Add rotation parameter for PDF in landscape mode.
Add warning message if no WMS layer found for generating thumbnail.
Dublin core / Use isPartOf for parent/child relation #432.
Avoid JS error on widget apps which does not display bbox coordinates input.
Merge pull request #426 from fxprunayre/feature/wms-thumbnail-maker

WMS thumbnail maker panel
Cleaning.
Update to OL v3.0.0b2 (minified and non minified version of previous version were not in synch).
Misc fix for OL 3.0.0b2 (minified and non minified version).
JSLint.
JSLint.
JSLint.
Merge remote-tracking branch 'upstream/develop' into develop

Conflicts:
	web/src/main/webapp/WEB-INF/classes/setup/sql/data/data-db-default.sql
Merge remote-tracking branch 'upstream/develop' into develop
Update for thumbnail maker panel.