* fix exclusion of target from attributes for subgroup discovery (dependent variables)
* restrict runtime of examples (according to CRAN policies)
* update documentation for SDTaskConfig - attributes can be NULL so that all attributes
are included, otherwise a subset can be selected

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/subgroup@51 edb9625f-4e0d-4859-8d74-9fd3b1da38cb