Switch to Google Guava for public suffix API

[anjackson]

While porting for #10, this happened:

One issue I noticed was that the archive-access code brings in entire heritrix-commons just for one class, which appears to be quite general purpose:

import org.archive.net.PublicSuffixes;

(indeed, there is a Google Guava class that does pretty much the same thing). This seems a little over the top, so I copied the PublicSuffixes to iipc-web-commons under the org.archive.url package, along with the corresponding unit tests and effective_tld data file.

This is rather clumsy, and given this is provided by Google Guava, there seems little point maintaining our own code (assuming theirs is kept up to date). The task is then to check that the Google one is well maintained and switch over to that instead of copying in code from elsewhere.

[anjackson]

This actually turned in via iipc/webarchive-commons#1, and should be moved there.

[anjackson]

Re-filed as iipc/webarchive-commons#4.