Add note, fix links
Add note, fix links

Signed-off-by: Eli Skeggs <5085073edea185966a30aad7f06b91f6997b42e5@gmail.com>

skeggse/node-rijndael,worldline/node-rijndael,skeggse/node-rijndael,skeggse/node-rijndael,worldline/node-rijndael,nguyer/node-rijndael,worldline/node-rijndael,skeggse/node-rijndael,worldline/node-rijndael,nguyer/node-rijndael,worldline/node-rijndael,nguyer/node-rijndael,skeggse/node-rijndael,nguyer/node-rijndael,worldline/node-rijndael