edited the usage of import and require

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/quacn@114 e88ffafe-9d54-4131-9119-39fa2b540a54
check for presence of at least one edge in oneEdgeDeletedSubgraphComplexity 

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/quacn@115 e88ffafe-9d54-4131-9119-39fa2b540a54