* context: fixed documentation to be more specific about ContextKeyConn being the key for a gossh.ServerConn

Signed-off-by: Jeff Lindsay <progrium@gmail.com>

* server: fixes handler setup, changed to interface based handlers, added global request handler map

* tcpip: working remote forwarding

Signed-off-by: Jeff Lindsay <progrium@gmail.com>

* context: docs typo

Signed-off-by: Jeff Lindsay <progrium@gmail.com>

* session: always reply to unblock clients trying something

Signed-off-by: Jeff Lindsay <progrium@gmail.com>

* tcpip: stop listening when ssh clients disconnect

Signed-off-by: Jeff Lindsay <progrium@gmail.com>

* Remote forwarding (#87)

* Update generateSigner key size to 2048 (#62)

Fixes #58

* Add syntax highlighting to readme (#67)

* small api updates (#69)

These updates make it easier to implement and pass custom Session and
Context implementations

No compatibilty breaking, all tests pass

* Move channelHandlers to avoid ...