Simplify Table binding to use ScriptBinding and leverage new SDK binding power.

Fix #753
This also causes C# Node, and Python to share a codepath, and so fixes some C# cases that previously only worked in Node.

Author: MikeStall

src/WebJobs.Script/Binding/ExtensionBinding.cs

@@ -11,7 +11,6 @@
 using System.Threading.Tasks;
 using Microsoft.Azure.WebJobs.Script.Description;
 using Microsoft.Azure.WebJobs.Script.Extensibility;
-using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 
 namespace Microsoft.Azure.WebJobs.Script.Binding

src/WebJobs.Script/Binding/FunctionBinding.cs

@@ -47,10 +47,6 @@ internal static Collection<FunctionBinding> GetBindings(ScriptHostConfiguration
                     string type = function.Type.ToLowerInvariant();
                     switch (type)
                     {
-                        case "table":
-                            TableBindingMetadata tableBindingMetadata = (TableBindingMetadata)function;
-                            bindings.Add(new TableBinding(config, tableBindingMetadata, fileAccess));
-                            break;
                         case "http":
                             if (fileAccess != FileAccess.Write)
                             {