Creating password from stdin is not supported

[rmadamson]

ryan@hackbookpro:~/git/pkpass$ echo "whargarbl" | pkpass create --stdin testpw3
Enter Pin/Passphrase:
Enter password to create:

BlankPasswordError: User Provided password is blank or only spaces

[rmadamson]

A bit trixy, since stdin would need to give us password, description, and authorizer. Do we tokenize those and break them out as parameters to pkpass create? I suspect that it would be safe for description and authorizer to be viewed from ps output. The password itself, not so much

[rmadamson]

Okay fixed.

#183