Updated files...see notes-------------------------------------------> I fixed an overlooked error in the examples. I moved the initial declaration of the variable FRAME above the loop in 20 + examples that involved the method *READ.  I fixed commenting on those examples, and moved the CREATE-TRACKBAR functions above the loop on them as well.  Made better names for functions in highgui.lisp and created overloaded methods for them. Updated examples to reflect that. Removed WITH-CAPTURE and changed examples to use WITH-VIDEO-CAPTURE. Renamed DEL-VID-CAP to DEL-VIDEO-CAPTURE and DEL-VID-WRITER to DEL-VIDEO-WRITER. Updated doc. to match.