Allow "with" on ssh_channel/ssh.run
Move __enter__ and __exit__ to tubes.tube so it's available globally
Merge branch 'ssh-channel-with-statement' of https://github.com/zachriggle/pwntools into zachriggle-ssh-channel-with-statement
Fixed the placement of the __enter__ and __exit__ functions in pwnlib/tubes/tube.py
Merge branch 'zachriggle-ssh-channel-with-statement'