PrintPreview changes:

When you set the print plugin flag 'appendLegendOptions' to true, you can manage these legend options in the PrintPreview:

* Icon size
* Font family
* Font style
* Font size
* Force label
* Dpi

Playng with these options you can fix common issues as too big legend in the printed map or incorrect font family.

Also, you have an option called 'addGraticuleControl' for add a new checkbox into the the print preview to activate or deactivate the graticule in the print. When you enable this option you can add another config parameter to the print plugin called 'offsetByScale' that fixes the graticule layer labels to show it into the printed PDF.
Merge pull request #233 from alediator/print_preview_tabs

PrintPreview changes:
Improve i18n for 'PrintPreview' and 'LegendStylePanel'. Close #236.
Landscape option into print plugin

When you add the option 'addLandscapeControl' to the print plugin, a new checkbox apear when you select '2 pages legend' option. This option select the new configuration into the config.yaml as '*_landscape'.
Merge pull request #237 from alediator/print_preview_landscape_option

Landscape option in the print plugin
Fix for 'landscapeCheckbox' default settings in PrintPreview. Close #238
Introduce 'fontAntiAliasing' legend options to the print tool. Close #240
fixed #245: added headers option (mainly for authentication) to WPSClient/WPSProcess
fixed #246: added authentication support to WMSGetFeatureInfo