Improve Hash documentation.
Improve Hash documentation.

sholsapp/cryptography,sholsapp/cryptography,Hasimir/cryptography,dstufft/cryptography,dstufft/cryptography,skeuomorf/cryptography,bwhmather/cryptography,kimvais/cryptography,skeuomorf/cryptography,kimvais/cryptography,dstufft/cryptography,Hasimir/cryptography,Lukasa/cryptography,kimvais/cryptography,Ayrx/cryptography,Lukasa/cryptography,Ayrx/cryptography,Ayrx/cryptography,dstufft/cryptography,dstufft/cryptography,bwhmather/cryptography,skeuomorf/cryptography,Hasimir/cryptography,Lukasa/cryptography,Ayrx/cryptography,Hasimir/cryptography,sholsapp/cryptography,bwhmather/cryptography,glyph/cryptography,sholsapp/cryptography,bwhmather/cryptography,glyph/cryptography,kimvais/cryptography,skeuomorf/cryptography