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using boost::regex if compiler doesn't supply a working version of std::regex (for example gcc 4.8.x)
Signed-off-by: Étienne Schmitt <etienne.schmitt@inria.fr>

Signed-off-by: Étienne Schmitt <etienne.schmitt@inria.fr>

Conflicts:
	CGoGN/src/Utils/GLSLShader.cpp

Develop

See merge request !55

Conflicts:
	CGoGN/src/Utils/Shaders/shaderPhong.cpp
	CGoGN/src/Utils/Shaders/shaderSimpleFlat.cpp

Develop

See merge request !53