Small improvements about printing
Fixes for MetadataExplorer, geonetwork template and added new configs
 - merging NURC IDA stuff to master
 - merge
 - Raster Statistics
 - reverting latest NURC IDA merge commits
 + Print Widget Upgrade
 + ScaleBar and MousePosition Improvements
 + Layer Properties; Raster Statistics
 + Print Shanpshot Widget
 + Configuration updates
MapStore Training documentation. close #223
Refinements on mapstore print
Merge branch 'master' of https://github.com/geosolutions-it/mapstore into nurcPortback-PrintUpdates
Merge pull request #218 from geosolutions-it/nurcPortback-PrintUpdates

 + Print Widget Upgrade
Made scalebar type configurable and some fixes
Merge branch 'master' of https://github.com/geosolutions-it/mapstore into nurcPortback-ScaleOverlay
Merge pull request #219 from geosolutions-it/nurcPortback-ScaleOverlay

 + ScaleBar and MousePosition Improvements
Made raster stats configurable on layerproperties tool and more cleanup
Merge branch 'master' of https://github.com/geosolutions-it/mapstore into nurcPortback-RasterStats