Pipeline and bot support for wpull's PhantomJS mode.

This commit also introduces Trollop for job option parsing, because
that's a job I no longer want to handle myself.
Require that pipeline nodes have PhantomJS.

1.9.0 is latest stable.
Require wpull 0.33.1.

0.33.1 contains a fix for https://github.com/chfoo/wpull/issues/120,
which needed to be resolved for ArchiveBot use.
Bump pipeline version.