Taking v1 as the first release (#92)

- file reading
- decoding master file

tests/test_config.hpp.in

@@ -0,0 +1,12 @@
+#pragma once
+#include <filesystem>
+#include <cstdlib>
+
+
+inline auto test_data_path(){
+    if(const char* env_p = std::getenv("AARE_TEST_DATA")){
+        return std::filesystem::path(env_p);
+    }else{
+        throw std::runtime_error("AARE_TEST_DATA_PATH not set");
+    }
+}