Feature/more docs fixes

Added a fix for some build warnings. (cd docs; make html) - still one left. Not sure about it, also probably not worth my time. Will try to actually start using the api next. also I still didn't look at explorer too closely. T-4 here for hackathon start, and there is at least on "Enlightend" level python hacker according to our poll, and another guy that did his own city budget comparison project and wants to see how it can be integrated (although php/mssql): http://www.publicsectorcredit.org/ca/en/cities