scp and ssh-keygen added

I've added a ssh-keygen for rsa/dsa keys. It stores them in stash/.ssh. scp emulates secure copy. I did not write most of the code, it's a script that uses paramiko. It follows scp syntax for files/host but does not have any flags. It uses the -r flag (recursive) for everything regardless if it's a file or dir. 

I'm rather new to git so I'm sorry if I'm not using it corectly. Please feel free to let me know if there is another way that I am suppose to create a pull request.