Add link to workflow documentation

Right now this just has the upload schedule workflow, but others can be
easily added.

task #293: Add building of workflow pdfs to build and release 
http://github.com/jpschewe/fll-sw/issues/issue/293
Build wiki and workflow documentation as part of distribution

task #293: Add building of workflow pdfs to build and release 
http://github.com/jpschewe/fll-sw/issues/issue/293