Update tcl/debug package

Rename namespace from Debug to debug (since package name is all
lowercase already)
Create new Tcl package tcl/qutils for common Tcl utilities

* Move utility code from admin/gentoo/puse to tcl/qutils
* Add all qutils procs to the qutils namespace
* Extend the string ensemble with ::qutils::stringPad as [string pad]
* Import and use procs from qutils in admin/gentoo/puse