--base-path command-line option is not available

[BennerGe]

In the index.html in line 27 a command-line option '--base-path' is mentioned, but this option doesn't exist in polymer-cli (version 1.5.4).

[TimvdLippe]

@usergenic could you chime in on this one? I see basePath is part of builds, but not on the command line.