stats, graphics, tools, utils now in "Imports" rather than "Depends"
extended license from "GPL-2" to "GPL-2 | GPL-3"



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/exams@614 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Moved personal unexported XML/QTI tools to a separate xmltools.R which
is in .Rbuildignore. Otherwise R's code checks are still applied to all
code which isn't as portable as it could be.



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/exams@615 edb9625f-4e0d-4859-8d74-9fd3b1da38cb