Stuff to make linux build work

SConstruct

@@ -43,7 +43,7 @@ else:
 	""")
 
 if str(platform) == "posix":
-	env.Append(CXXFLAGS="-std=c++11")
+	env.Append(CXXFLAGS="-std=c++11 -stdlib=libstdc++")
 	env["CC"] = 'clang'
 	env["CXX"] = 'clang++'
 if str(platform) == "darwin":

src/tools/fileio.cpp

@@ -57,6 +57,7 @@ void init_directories(const char* exec_path) {
 #endif // __APPLE__
 #endif // _Win32||_Win64
 	scenDir = tempDir/"Scenarios";
+	fs::create_directories(scenDir);
 	tempDir /= "Temporary Files";
 	
 	// Depending on the build environment, we may need to redirect stdout and stderr.