Hello World example

examples/basic/01_HelloWorld/HelloWorld.pow

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+kapow route add /helloworld -c "echo 'Hello World!' | kapow set /response/body"

examples/basic/01_HelloWorld/README.md

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+# A simple Hello World example
+
+## How to run it?
+
+```
+$ kapow server HelloWorld.pow
+```
+
+
+## How to consume it?
+
+```
+$ curl http://localhost:8080/helloworld
+Hello World!
+```