fix polygon selection and add steam deploy script

src/main.cpp

@@ -689,6 +689,7 @@ int main(int argc, char** argv)
         return -1; // A negative number because you are a negative one
     }
 
+    bool start_in_vr = false;
     if (argc > 1)
     {
         switch (const_hash(argv[1]))
@@ -697,6 +698,9 @@ int main(int argc, char** argv)
             App::I.initShaders();
             App::I.cmd_convert(argv[2], argv[3]);
             return 0;
+        case const_hash("-vrmode"):
+            start_in_vr = true;
+            break;
         default:
             break;
         }
@@ -844,6 +848,9 @@ int main(int argc, char** argv)
 
     SetTimer(hWnd, 1, 500, NULL);
 
+    if (start_in_vr)
+        App::I.vr_start();
+
     MSG msg;
     LOG("start main loop");
     while (running == 1)