Add more tools with brief summary / assessment

[RickMoynihan]

Here are some tools I discovered -- though I haven't actually looked at or tried any to any sufficient depth yet:

• https://csvw.opendata.cz/validation
• http://rdf.greggkellogg.net/distiller?command=serialize
• Adrian Gschwend / Zazuko https://github.com/rdf-ext/rdf-parser-csvw
• https://github.com/GSS-Cogs/csvw-check from ONS team

At some point it would be worth assessing them for completeness etc before offering recommendations or guidance.

Perhaps we could use the wiki to maintain an adhoc list more easily; and use the site as a promoted / vetted list eventually?

[gkellogg]

From the Implementation Report, there are also the following implementations:

• csv2json/csv2rdf/csvlint – Open Data Institute
• pycsvw – Sebastian Neumaier
• rcsvw – Davide Ceolin
• RDF::Tabular – Gregg Kellogg (included in rdf.greggkellogg.net/distiller)