Fix for projects.json and projectlist.json in docs

[willismonroe]

Seems like all the project specific files are down though... [project]/{x}.json returns an empty page, [project]/json/{x}.json just provides a zip file of the entire project.

[jnovotny-lmu]

Dear Willis,
The final element should be .zip, not .json. For example, http://oracc.museum.upenn.edu/json/rinap-rinap1.zip returns the JSON dataset for rinap/rinap 1.

[willismonroe]

The documentation says that you can retrieve the individual json files:

For the project rimanum, the URL http://oracc.org/rimanum/manifest.json, yields the following

but that URL resolves to a blank page.

If you change it to http://oracc.museum.upenn.edu/rimanum/json/manifest.json, you get the full project zip file. In fact any URL under [project]/json/ results in the full project zip file, http://oracc.museum.upenn.edu/rimanum/json/nozipplease.json regardless of whether it's a valid JSON endpoint according to the documentation.