* slow steps towards a string_view experiment
* Move first set of file-handling code to use string_view
This is about 12% faster on my machine
* oops, yaehmop had not been updated to C++17
* start moving v3000 over
* disable storing string_views in Dicts.
* a bit more optimization
* get windows builds working
* fix a couple leaks in the test code
* changes in response to review
* changes suggested in review
+ more refactoring
* fix an oversight
* remove another one
* remove debugging numbers