Move string view decision to configure time - WIP#1608

SwintonStreet wants to merge 2 commits intoopen-source-parsers:masteropen-source-parsers/jsoncpp:masterfrom

SwintonStreet:Move-string_view-decision-to-configure-timeSwintonStreet/jsoncpp:Move-string_view-decision-to-configure-timeCopy head branch name to clipboard