'B::Keywords' supplies seven arrays of keywords: '@Scalars', '@Arrays',
'@Hashes', '@Filehandles', '@Symbols', '@Functions', and '@Barewords'. The
'@Symbols' array includes the contents of each of '@Scalars', '@Arrays',
'@Hashes', '@Functions' and '@Filehandles'. Similarly, '@Barewords' adds a
few non-function keywords and operators to the '@Functions' array.

All additions and modifications are welcome.