Starting SSH Refactor. This probably won't work.

Removed all of my old code and snagged the SSH code from the knife ssh
bootstrap methods.
Migrated all SSH code to use the knife.ssh methods rather than my own
wheel.
Updated README, CHANGES, removed pry debugging symbol.
Added gemnasium badge.
Added a rescue to handle Net::SSH::Disconnect.
Added a missing : in the Net::SSH::Disconnect rescue.
Added additional debugging/traceback info if there is a critical error that isn't captured.
Merge remote-tracking branch 'origin/refactor_ssh'

Conflicts:
	README.rdoc

Merging the SSH refactor.
New version as there is now full dependency on the knife_ssh code and has the ability to do async start & stops.