Add Algorithm::compress() and Algorithm::decompress()

[thekid]

This pull request adds two methods to the io.streams.compress.Algorithm class to compress string data and decompress bytes.

use io\streams\Compression;

$compressed= Compression::named($argv[1]);

$bytes= $compressed->compress($argv[2], Compression::STRONGEST);
$data= $compressed->decompress($bytes);

[thekid]

Released in https://github.com/xp-forge/compression/releases/tag/v1.4.0