Revert "Split out Chunker from Hash."

This reverts commit c66bc720ce9c8fda6e83278a7a35fbc4527b6cf1.
Fix name.
Byte length, arrays for output and tests.
Basic blocks and test.
Parse X.509 and PKCS#9 public and private keys from ASN.1.

HUGE thanks to Lapo Luchini for his ASN.1 parser!!!

http://lapo.it/asn1js/