Add *VERBOSE* to enable printing of toplevel forms as they're compiled.
Fix (COPY-LIST NIL), and add a few tests for COPY-LIST.

Previously this returned (NIL)
Fix test system to run also in the host system again
Merge pull request #155 from orodley/verbose-compilation

Add *VERBOSE* to enable printing of toplevel forms as they're compiled.
Merge pull request #157 from orodley/copy-list-nil

Fix (COPY-LIST NIL), and add a few tests for COPY-LIST.