ssh: change con to connect for naming convention

Change to the same naming convention as the other commands
shell: spawn shells without history

We do not wish for 9pm execute commands to be stored in our shell
history files. Simply set the environment variable HISTFILE to /dev/null
before we spawn a shell.
Merge pull request #21 from vonBr/master

ssh: change con to connect for naming convention
Merge pull request #22 from neg/nohistory

shell: spawn shells without history