add 0.6.1 changelog to master
add 0.6.1 changelog to master

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