[RandVar, RobAStBase, ROptEst, RobAStRDA]: fixed some issue with (second-order) imported NAMESPACE (from pkg. startupmsg) and updated NEWS file

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@793 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
[RobExtremes]: fixed some issue with (second-order) imported NAMESPACE (from pkg. startupmsg) and updated NEWS file; fixed missing 1/n in gev.diag / gpd.diag (spotted by Bernhard Spangl)

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@794 edb9625f-4e0d-4859-8d74-9fd3b1da38cb