* make use of new wxSmith code-generation for wxMathPlot
* fix plot axis not being shown
* update to wxMathPlot library to use pi constant from C++ if available
* updated libJSONCons to v1.2.0
- remove Makefile for jsoncons library
- updated several batch files
* updated libJSONCons to v1.1.0
- updated README.md of CSV library (forgotten in previous commit)
* modernise wxMathPlot, based on: https://github.com/GitHubLionel/wxMathPlot
* updated libJSONCons to v0.178.0