[#66,#64,refactor][m]: functional data loading from gdocs in node.

* no connection with frontend yet
[refactor][s]: remove long unused methods from frontend census.js.
[#66,refactor][l]: country results now running off node data via "api".

* Also move a *lot* of logic re scoring and cleaning of data from frontend to node (and add tests)
[#66,refactor][s]: normalize field names in results to have no '-'.
[#66,refactor][s]: switch to have place as column name for city / country in source spreadsheet.
[tests][s]: refactor to load data in before.
[#66][s]: normalize country dataset names to ids (breaks frontend atm).
[#66][s]: country data keyed by place (then dataset).
[#70][l]: refactor summary table to be built in backend rather than js (country only atm).