small improvements in mob vignette
added TeachingRatings and Titanic applications
some more touch-ups needed for new applications



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partykit@441 255f4249-2263-4417-b1ea-8498779e27a7
added maxdepth argument to mob_control and mob
renamed minsplit to minsize because it really corresponds more
to minbucket but is somewhat different...



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partykit@442 255f4249-2263-4417-b1ea-8498779e27a7