Initial commit of bgameboy v000.

The source tarball also included empty obj/ and out/ directories which
git does not support.

byuu says:

Project started, so basically everything is new.

It's basically a rough skeleton that mimics bsnes project structure.
Eventually the src/gameboy folder will be copied into bsnes-official and
used by the chip/supergameboy core.
The middleware layer (supergameboy/interface) will be merged into a new
chip/icd2 folder that will represent direct Super Game Boy emulation in
the future.
At least, if all goes according to plan.

There is a simple GUI that can load ROMs, but do nothing after it. It's
not hooked up to ruby yet.
There is a basic system class and interface to expose the
video/audio/input functions.
There is a basic memory bus that doesn't support any MBCs yet.
There is a CPU skeleton that only handles easy read/write access to the
CPU registers (AF is a really fucked up register.)
The core is not hooked up to libco yet, but I intend for it to be, so
that I can run the CPU + LCD how I like.
If it turns out the LCD+audio is easily enslavable, then I'll probably
drop libco and just run it like a regular emulator, using a thread
wrapper around it in bsnes only. We'll see.

The CPU doesn't actually support any opcodes, and loading a ROM won't
actually execute anything.

ui/main.cpp

@@ -0,0 +1,26 @@
+#include "base.hpp"
+Application application;
+
+#include "interface.cpp"
+
+#include "general/main-window.cpp"
+
+void Application::main(int argc, char **argv) {
+  quit = false;
+
+  mainWindow.create();
+
+  mainWindow.setVisible();
+
+  GameBoy::system.init(&interface);
+
+  while(quit == false) {
+    OS::run();
+  }
+}
+
+int main(int argc, char **argv) {
+  application.main(argc, argv);
+
+  return 0;
+}