Updating ssh2 to version 0.3.3 and relying on new changes

Due to new changes to ssh2, we no longer have to worry about buffer to stream translation.

Removed references to bufferStreams.
close events dont pass event object
version bump for project and ssh2 dependency
readme note for disconnects
readme note for disconnects
Merge pull request #11 from gtg092x/sshbump

Sshbump