+ Print Widget Upgrade
 + ScaleBar and MousePosition Improvements
 + Layer Properties; Raster Statistics
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
Merge pull request #220 from geosolutions-it/nurcPortback-RasterStats

 + Layer Properties; Raster Statistics
Merge with master