Defines a new package called PACKAGE. Each of OPTIONS should be one of the
following:
(USE {package-name})
(EXPORT {symbol-name})
(IMPORT-FROM <package-name> {symbol-name})
(SHADOW {symbol-name})
(SHADOWING-IMPORT-FROM <package-name> {symbol-name})
(LOCAL-NICKNAMES {local-nickname actual-package-name})
(LOCK boolean)
(IMPLEMENT {package-name})
(DOCUMENTATION doc-string)
(INTERN {symbol-name})
(SIZE )
(NICKNAMES {package-name}*)
All options except SIZE, LOCK, and :DOCUMENTATION can be used multiple
times.