Allow the tcz command to fetch different hosts, versions, ports, and so forth.

-h host
-p port
-v version
-a architecture

Tested with fetching bash, e.g.
tcz bash

works.

Also, if there is no .dep, make an empty .dep for ease later with cache packages.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>