r37
[INIReader] according to comment https://github.com/benhoyt/inih/pull/53#issuecomment-246465765 Get method should not return constant reference to std::sting storage in the class.
Added GetReal() to parse a floating point number (double) in C++ INIReader interface. See: http://blog.brush.co.nz/2009/02/inih/#comment-160441