Payload is not necessarily unencrypted when it leaves the tor network (think https, SSL, TLS, etc.)
"The implemention" is singular, so "a means" instead of "means"
Replaced "ditch" with "discontinue" and removed the unnecessary "such as onion routing" example.
Fixed section about onion routing by cleaning up latex code, fixing typos and modifying some sentence structure.
Fixes for onion routing section
Fixed long sentences and errors in the directory servers part
Merge branch 'rolf-corrections'