Delete .tar, .get-output, and .get-errors files on "clean" target.
-rw-r--r-- 1390 AUTHORS
-rw-r--r-- 4621 LICENSE
-rw-r--r-- 244 Makefile
drwxr-xr-x - doc
drwxr-xr-x - specs
drwxr-xr-x - src
drwxr-xr-x - tests