Add Example.Data assembly; m-n-relation for Permissions

src/Example.Data/Example.Data.xproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>2057c0d5-2da8-4327-bf8f-1a008783b38c</ProjectGuid>
+    <RootNamespace>Example.Data</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>

src/Example.Data/ExampleDbContext.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.Data.Entity;
+using Microsoft.Data.Entity.Infrastructure;
+using WaCore.Data;
+
+namespace Example.Data
+{
+    public class ExampleDbContext : WaCoreDbContext
+    {
+        public ExampleDbContext(DbContextOptions options) :
+            base(options)
+        { }
+        protected override void OnModelCreating(ModelBuilder builder)
+        {
+            base.OnModelCreating(builder);
+            // Customize the ASP.NET Identity model and override the defaults if needed.
+            // For example, you can rename the ASP.NET Identity table names and more.
+            // Add your customizations after calling base.OnModelCreating(builder);
+        }
+    }
+}