Look for data files in the folder where the executable is

Kind of fix or workaround for #7

src/core/Utility.cpp

@@ -100,3 +100,9 @@ void throwException__(const std::string &message)
 {
     throw std::logic_error(message);
 }
+
+std::string util::executableDirectory()
+{
+    std::filesystem::path filePath = executablePath();
+    return filePath.parent_path().string();
+}

src/core/Utility.h

@@ -134,6 +134,7 @@ inline bool floatsEquals(const double a, const double b)
 bool openUrl(const std::string &url, std::string *error);
 
 std::string executablePath();
+std::string executableDirectory();
 
 }
 

src/global/Config.cpp

@@ -288,6 +288,10 @@ bool Config::parseOptions(int argc, char **argv)
         }
     }
 
+    if (getValue(GamePath).empty()) {
+        setValue(GamePath, util::executableDirectory());
+    }
+
     if (getValue(GamePath).empty()) {
         setValue(GamePath, getRegistryString(s_registryGroupTC, s_registryKey));
     }

src/main.cpp

@@ -237,7 +237,7 @@ try
             break;
         }
     }
-    DBG << "executable path" << util::executablePath();
+    DBG << "executable path" << util::executablePath() << "folder:" << util::executableDirectory();
 
     Config &config = Config::Inst();