Add readmes to examples

examples/mig-example-apps/Counter/README.md

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+# Counter 
+
+An example on how to use Reader-pattern with the `mig` library.

examples/mig-example-apps/CounterClient/README.md

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+# CounterClient 
+
+An example on how to build client and server from the same code
+

examples/mig-example-apps/HelloClient/README.md

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+# Hello world server and client
+
+An example on how to build server and client from the same code.

examples/mig-example-apps/HelloWorld/README.md

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+# Hello wrold server
+
+An example of the most basic JSON API server
+that has two routes. It can greet the user and say good bye.
+
+We can use `curl` to test it.
+Run it with:
+
+```
+> stack run hello-world-mig-example-app	
+```
+
+After server start we can test it with [Swagger UI](http://localhost:8085/swagger-ui/index.html).
+Or with curl:
+
+Curl for hello route
+```
+curl -X 'GET' \
+  'http://localhost:8085/api/v1/hello' \
+  -H 'accept: application/json'
+```
+
+Curl for bye route
+
+```
+curl -X 'GET' \
+  'http://localhost:8085/api/v1/bye?user=alice' \
+  -H 'accept: application/json'
+```  

examples/mig-example-apps/Html/README.md

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+# Html 
+
+A simple blog post site that servers HTML.
+To run use:
+
+```
+> stack run html-mig-example-app
+```
+After server start we can try it out in the browser. Go to [the main page](http://localhost:8085).

examples/mig-example-apps/HtmlTemplate/README.md

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+# HtmlTemplate 
+
+A variation of `Html` example with safe URLs and HTML-templates based on mustache.
+
+To run use:
+
+```
+> stack run html-template-mig-example-app
+```
+
+After server start we can try it out in the browser. Go to [the main page](http://localhost:8085).

examples/mig-example-apps/JsonApi/README.md

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+# JsonApi 
+
+A weather forecast JSON API example. It shows how to build JSON API servers.
+
+To run use:
+
+```
+> stack run json-api-mig-example-app
+```
+
+After server start we can test it with [Swagger UI](http://localhost:8085/swagger-ui/index.html).
+

examples/mig-example-apps/RouteArgsClient/README.md

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+# RouteArgsClient 
+
+Client with all sorts of inputs
+