Teach the pipeline a no_offsite_links item attribute.  #90.

Also disable span-hosts-allow=linked-pages in !ao mode and add a test
suite for wpull argument generation.
Teach the bot about --no-offsite-links.  #90.
Use relative imports for the Lua pattern conversion test.

This gets them running using nosetests under Python 3.4.
Remove duplicate span-hosts-allow argument.  #90.
Bump pipeline version.
Describe --no-offsite-links.  #90.
Merge remote-tracking branch 'origin/master'