nsf.c: * change DeleteProcsAndVars, such it deletes procs and vars explicitely in all namespaces * added more sanity checks for parameterContexts, testing in ParseContextRelease() in DEBUG mode * provide debug-refcounts for "pcPtr.objv" * provide debug-refcounts for "pcPtr.clientData"
- nsf.c: * refined refcounting debugging * fixed various refcounting bugs, especially in error cases. * added explicit INCR_REF_COUNTs on Tcl_Objs with 0-refCount to ease debugging