clock.cabal: break up lines of extensions field.
Avoid haddock warning by exporting nsec,sec with TimeSpec.
Simpler Ord instance for TimeSpec.
Use pre-field docstrings, rather than post-field docstrings, wrap.
Inline (|.) and (|^).
Rename csec/ to more standard cbits/.
Use alloca instead of malloc. Much more efficient.

See [GHC manual](https://www.haskell.org/ghc/docs/latest/html/users_guide/ffi-ghc.html)
concerning efficiency claim.
Merge pull request #10 from mboes/simple-cleanups

Simple cleanups