Added usage examples

* Cleaned up project.json

* Updated README with example on how to deserialize json request body

* Added reference to System.Runtime.Serialization.Json as this would seems a common usage

* Added C# example files to the /Examples directory

examples/dotnet/arguments.cs

@@ -0,0 +1,11 @@
+using System;
+using Fission.DotNetCore.Api;
+
+public class FissionFunction 
+{
+    public string Execute(FissionContext context){
+        var x = Convert.ToInt32(context.Arguments["x"]);
+        var y = Convert.ToInt32(context.Arguments["y"]);
+        return (x+y).ToString();
+    }
+

examples/dotnet/helloworld.cs

@@ -0,0 +1,9 @@
+using Fission.DotNetCore.Api;
+
+public class FissionFunction
+{
+    public string Execute(FissionContext context)
+    {
+        return "Hello World!";
+    }
+}

examples/dotnet/requestbody.cs

@@ -0,0 +1,24 @@
+using System.IO;
+using System.Runtime.Serialization.Json;
+using Fission.DotNetCore.Api;
+
+public class FissionFunction
+{
+    public string Execute(FissionContext context)
+    {
+        var person = Person.Deserialize(context.Request.Body);
+        return $"Hello, my name is {person.Name} and I am {person.Age} years old.";
+    }
+}
+
+public class Person
+{
+    public string Name { get; set; }
+    public int Age { get; set; }
+
+    public static Person Deserialize(Stream json)
+    {
+        var serializer = new DataContractJsonSerializer(typeof(Person));
+        return (Person)serializer.ReadObject(json);
+    }
+}

examples/dotnet/requestheaders.cs

@@ -0,0 +1,17 @@
+using System;
+using Fission.DotNetCore.Api;
+
+public class FissionFunction
+{
+    public string Execute(FissionContext context){
+        var buffer = new System.Text.StringBuilder();
+        foreach(var header in context.Request.Headers){
+                buffer.AppendLine(header.Key);
+                foreach(var item in header.Value){
+                        buffer.AppendLine($"\t{item}");
+                }
+        }
+        buffer.AppendLine($"Url: {context.Request.Url}, method: {context.Request.Method}");
+        return buffer.ToString();
+    }
+}