Bump to Tcl 8.6.3, TclOO 1.0.3, and update changes file.
merge trunk
by request
merge trunk
Merged latest trunk work (especially changes to eof handling) into the RC.
Make sure all uses of the [testbytestring] command are constrained.
update changes; more test suite polishing.
Correct -singleproc 1 testing flaws.
Likely fix for channel mem leaks.
merge release