On MinGW c++11 string conversion functions are deactivated because of a bug. This commit works around the issue by using a replacement for std::stod if compiling on MinGW
On MinGW c++11 string conversion functions are deactivated because of a bug. This commit works around the issue by using a replacement for std::stod if compiling on MinGW

bgrimstad/splinter,lasote/multivariate-splines,ds283/splinter,bgrimstad/splinter,ds283/splinter,ds283/splinter,bgrimstad/splinter,bgrimstad/splinter,ds283/splinter,ds283/splinter,bgrimstad/splinter