Fix build errors

[incebellipipo]

The SDK stopped building with the recent commits. By looking at the recent commits and pull request I understand that there is some refactoring underway. But I thought I'd fix the build errors.

$ mkdir build
$ cd build
$ cmake ..

cmake.log

-- Configuring done
-- Generating done
-- Build files have been written to: build

make -j10

Consolidate compiler generated dependencies of target qualisys_cpp_sdk
[ 28%] Building CXX object CMakeFiles/qualisys_cpp_sdk.dir/MarkupSerializer.cpp.o
[ 28%] Building CXX object CMakeFiles/qualisys_cpp_sdk.dir/Settings.cpp.o
Settings.cpp: In function ‘const char* qualisys_cpp_sdk::SkeletonDofToStringSettings(qualisys_cpp_sdk::EDegreeOfFreedom)’:
Settings.cpp:5:20: error: ‘find_if’ is not a member of ‘std’
    5 |     auto it = std::find_if(DEGREES_OF_FREEDOM.begin(), DEGREES_OF_FREEDOM.end(), [&](const auto& DEGREE_OF_FREEDOM) { return (DEGREE_OF_FREEDOM.first == dof); });
      |                    ^~~~~~~
Settings.cpp: In function ‘qualisys_cpp_sdk::EDegreeOfFreedom qualisys_cpp_sdk::SkeletonStringToDofSettings(const string&)’:
Settings.cpp:17:20: error: ‘find_if’ is not a member of ‘std’
   17 |     auto it = std::find_if(DEGREES_OF_FREEDOM.begin(), DEGREES_OF_FREEDOM.end(), [&](const auto& DEGREE_OF_FREEDOM) { return (DEGREE_OF_FREEDOM.second == str); });
      |                    ^~~~~~~
make[2]: *** [CMakeFiles/qualisys_cpp_sdk.dir/

build.make:132: CMakeFiles/qualisys_cpp_sdk.dir/Settings.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
MarkupSerializer.cpp: In member function ‘virtual bool qualisys_cpp_sdk::CMarkupDeserializer::Deserialize3DSettings(qualisys_cpp_sdk::SSettings3D&, bool&)’:
MarkupSerializer.cpp:1478:5: error: ‘strcpy’ was not declared in this scope
 1478 |     strcpy(p3dSettings.pCalibrationTime, tStr.c_str());
      |     ^~~~~~
MarkupSerializer.cpp:7:1: note: ‘strcpy’ is defined in header ‘<cstring>’; did you forget to ‘#include <cstring>’?
    6 | #include <map>
  +++ |+#include <cstring>
    7 |
MarkupSerializer.cpp: In member function ‘virtual std::string qualisys_cpp_sdk::CMarkupSerializer::SetCameraSyncOutSettings(unsigned int, unsigned int, const qualisys_cpp_sdk::ESyncOutFreqMode*, const unsigned int*, const float*, const bool*)’:
MarkupSerializer.cpp:3386:24: error: could not convert ‘false’ from ‘bool’ to ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’}
 3386 |                 return false; // Should never happen
      |                        ^~~~~
      |                        |
      |                        bool
make[2]: *** [CMakeFiles/qualisys_cpp_sdk.dir/build.make:146: CMakeFiles/qualisys_cpp_sdk.dir/MarkupSerializer.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/qualisys_cpp_sdk.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

make.log
cmake.log