Added TumbleBit controller

Breeze/src/Breeze.TumbleBit.Client/Breeze.TumbleBit.Client.csproj

-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard1.4</TargetFramework>
+    <TargetFramework>netstandard1.6</TargetFramework>
+    <AssemblyName>Breeze.TumbleBit.Client</AssemblyName>
+    <PackageId>Breeze.TumbleBit.Client</PackageId>
+    <NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
+    <PackageTargetFallback>$(PackageTargetFallback);dnxcore50</PackageTargetFallback>
+    <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
+    <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
+    <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="1.0.3" />
+    <PackageReference Include="Serilog.Extensions.Logging.File" Version="1.0.1" />
+  </ItemGroup>
+
 </Project>
\ No newline at end of file

Breeze/src/Breeze.TumbleBit.Client/Class1.cs

-using System;
-
-namespace Breeze.TumbleBit.Client
-{
-    public class Class1
-    {
-    }
-}

Breeze/src/Breeze.TumbleBit.Client/Controllers/TumbleBitController.cs

+using Breeze.TumbleBit.Models;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Breeze.TumbleBit.Controllers
+{
+    /// <summary>
+    /// Controller providing TumbleBit operations.
+    /// </summary>
+    [Route("api/v{version:apiVersion}/[controller]")]
+    public class TumbleBitController : Controller
+    {
+        /// <summary>
+        /// Connect to a tumbler.
+        /// </summary>
+        /// <param name="request">The object containing the parameters used to connect to a tumbler.</param>        
+        [Route("connect")]
+        [HttpPost]
+        public IActionResult Connect([FromBody]TumblerConnectionRequest request)
+        {
+            return this.Ok();
+        }
+    }
+}

Breeze/src/Breeze.TumbleBit.Client/Models/RequestModels.cs

+using System;
+using System.ComponentModel.DataAnnotations;
+using Newtonsoft.Json;
+
+namespace Breeze.TumbleBit.Models
+{
+    /// <summary>
+    /// Base class for request objects received to the controllers
+    /// </summary>
+    public class RequestModel
+    {
+        public override string ToString()
+        {
+            return JsonConvert.SerializeObject(this, Formatting.Indented);
+        }
+    }
+
+    /// <summary>
+    /// Object used to connect to a tumbler.
+    /// </summary>
+    public class TumblerConnectionRequest : RequestModel
+    {
+        [Required(ErrorMessage = "A server address is required.")]
+        public Uri ServerAddress { get; set; }
+
+        public string Network { get; set; }
+    }
+}