A new debugger.

Lots of bugs/rough edges/etc - issues will be filed.
Old-style debugging still works (just use --emit_source_annotations to get
the helpful movs back and --break_on_instruction will still fire).

src/xenia/ui/window.cc

@@ -493,6 +493,7 @@ void Window::OnKeyUp(KeyEvent* e) {
 
 void Window::OnKeyChar(KeyEvent* e) {
   OnKeyPress(e, true, true);
+  on_key_char(e);
   OnKeyPress(e, false, true);
 }