properties files and related resources automatically updated from ggbtrans

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32849 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
* init RendererW only once
* add (empty) getData() for buffered image

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32850 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e