Initial commit of .NET port of FlatBuffers

Include C# codegen in flatc and .NET FlatBuffer access via the
FlatBufferBuilder class

Tested: on Windows.

Change-Id: If5228a8df60a10e0751b245c6c64530264ea2d8a

tests/FlatBuffers.Test/Program.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Linq;
+using System.Reflection;
+
+namespace FlatBuffers.Test
+{
+    static class Program
+    {
+        public static int Main(string[] args)
+        {
+            var tests = new FlatBuffersExampleTests();
+            try
+            {
+                tests.RunTests();
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("FlatBuffersExampleTests FAILED - {0}", ex.GetBaseException());
+                return -1;
+            }
+
+            // Run ByteBuffers Tests
+            var testClass = new ByteBufferTests();
+
+            var methods = testClass.GetType().GetMethods(BindingFlags.Public |
+                                                         BindingFlags.Instance)
+                          .Where(m => m.Name.StartsWith("ByteBuffer_"));
+            foreach (var method in methods)
+            {
+                try
+                {
+                    method.Invoke(testClass, new object[] { });
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine("ByteBufferTests FAILED when invoking {0} with error {1}",
+                                      method.Name, ex.GetBaseException());
+                    return -1;
+                }
+
+            }
+
+            return 0;
+        }
+    }
+}