Add json support to wpiutil.

This is a modified version of https://github.com/nlohmann/json.

It's been moved into the wpi namespace as many of the changes are not
compatible.  The amount of template code has been significantly reduced,
enabling many functions to be moved out-of-line, and for the result to
build on older compiler versions (in particular GCC 4.8).
This commit is contained in:
Peter Johnson
2017-06-15 13:22:55 -07:00
parent de9dd1180b
commit 301442ee43
35 changed files with 28635 additions and 2 deletions

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