Add addition and subtraction for integers, build macros, dgo building, and build/load test (#35)

* see if math works on windows

* add dgo

* windows debug

* windows debug 2

* one more debug try

* add extra debug print and change logic for slashes

* update

* again

* try again

* remove build game

* remove build game

* add back build-game

* remove runtime from test

* test

* reduce number of files

* go to c++ 14

* big stacks

* increase stack size again

* clean up cmake files

common/util/DgoWriter.cpp

@@ -0,0 +1,28 @@
+#include "BinaryWriter.h"
+#include "FileUtil.h"
+#include "DgoWriter.h"
+
+void build_dgo(const DgoDescription& description) {
+  BinaryWriter writer;
+  // dgo header
+  writer.add<uint32_t>(description.entries.size());
+  writer.add_cstr_len(description.dgo_name.c_str(), 60);
+
+  for (auto& obj : description.entries) {
+    auto obj_data = file_util::read_binary_file(file_util::get_file_path({"data", obj.file_name}));
+    // size
+    writer.add<uint32_t>(obj_data.size());
+    // name
+    writer.add_str_len(obj.name_in_dgo, 60);
+    // data
+    writer.add_data(obj_data.data(), obj_data.size());
+    // pad
+    while (writer.get_size() & 0xf) {
+      writer.add<uint8_t>(0);
+    }
+  }
+
+  printf("DGO: %15s %.3f MB\n", description.dgo_name.c_str(),
+         (float)(writer.get_size()) / (1 << 20));
+  writer.write_to_file(file_util::get_file_path({"out", description.dgo_name}));
+}