nsf.c: - extended nsf::method::delete to handle ensemble names nx.tcl: - added tk/incr-tcl style cget methods on class/object levels. - improve copy handling with other child-types of the slot container working - make sure to ignore non-slot-type objects in slot introspection - worked on regression test until "methods.test". others are missing, but maybe reconsideration
- library/mongo: * updated interface to current nx * updated to mongo-c-driver 0.4 (current version) * The mongo c-driver does not allow to add DBRefs, since it refuses to accept field names with leading '$'. So we skip these tests for the time being.