Merge pull request #484 from D7EAD/master

Optionally make use of Markdown 'warning' notation.

Author: The-EDev

README.md

@@ -33,11 +33,11 @@ Crow is a C++ framework for creating HTTP or Websocket web services. It uses rou
 ## Documentation
 Available [here](https://crowcpp.org).
 
-## Examples
-
-#### Disclaimer
+> **Warning**
+> 
+> If you are using Crow v0.3, then you have to put `#define CROW_MAIN` at the top of one and only one source file.
 
-If you are using version v0.3, then you have to put `#define CROW_MAIN` at the top of one and only one source file.
+## Examples
 
 #### Hello World
 ```cpp