bsls_ByteOrderUtil: moved 'Dispatcher' to '_Impl' component
bsls_byteorderutil_impl: Renamed '...Impl' to '...Impl<0>'.  Renamed 'Dispatcher<SIZE>' to '...Impl<SIZE>'.
bsls_byteorderutil_impl: added some missing 'inline's to template functions, bde verify cleanup
bsls_byuteorderutil_impl: create '*_Concrete' helper class.
bsls_byteorderutil*: Clay's feedback, performance test
bsls_byteorderutil: add performance results for Windows
bsls_byteorderutil: add generic test machinery
bsls_byteorderutil: performance testing