Change the include path in examples as #175 (#180)

* Change the include path in examples as #175

* Change include path in scripts
diff --git a/examples/all_features/main.cpp b/examples/all_features/main.cpp
index f1c2af7..7d23812 100644
--- a/examples/all_features/main.cpp
+++ b/examples/all_features/main.cpp
@@ -1,5 +1,5 @@
 #define DOCTEST_CONFIG_IMPLEMENT
-#include "doctest.h"
+#include <doctest/doctest.h>
 
 #include "header.h"