-Modified Dockerfile.base to cudagl

-Changed demo to take in input from demoConfig.yaml file
-Readme changes for demo.md

demo/demoConfig.yaml

@@ -0,0 +1,22 @@
+# video input
+input     : "../demo/yolo_test.mp4"
+win_input : "..\\..\\..\\demo\\yolo_test.mp4"
+
+#cfg input
+cfg_input : "../tests/darknet/cfg/yolo4tiny.cfg"
+cfg_win_input : "..\\..\\..\\tests\\darknet\\cfg\\yolo4tiny.cfg"
+
+#name input
+name_input : "../tests/darknet/names/coco.names"
+name_win_input : "..\\..\\..\\tests\\darknet\\names\\coco.names"
+
+# network config
+net         : "yolo4tiny_fp32.rt"
+ntype       : 'y'
+n_classes   : 80
+n_batch     : 1
+conf_thresh : 0.3
+
+# demo config
+show  : true
+save  : false