Added support of different ID column types to Dapper.Rainbow

From time to time ID column has types different to int. With this change
you could specify column type if it is different to int. Example:
public Table<MyDb, Guid> Users { get; set; }

Dapper.Rainbow/Database.cs

@@ -24,7 +24,7 @@ namespace Dapper
     /// <typeparam name="TDatabase"></typeparam>
     public abstract class Database<TDatabase> : IDisposable where TDatabase : Database<TDatabase>, new()
     {
-        public class Table<T>
+        public class Table<T, TId>
         {
             internal Database<TDatabase> database;
             internal string tableName;
@@ -68,7 +68,7 @@ public string TableName
             /// <param name="id"></param>
             /// <param name="data"></param>
             /// <returns></returns>
-            public int Update(int id, dynamic data)
+            public int Update(TId id, dynamic data)
             {
                 List<string> paramNames = GetParamNames((object)data);
 
@@ -88,7 +88,7 @@ public int Update(int id, dynamic data)
             /// </summary>
             /// <param name="id"></param>
             /// <returns></returns>
-            public bool Delete(int id)
+            public bool Delete(TId id)
             {
                 return database.Execute("delete " + TableName + " where Id = @id", new { id }) > 0;
             }
@@ -98,7 +98,7 @@ public bool Delete(int id)
             /// </summary>
             /// <param name="id"></param>
             /// <returns></returns>
-            public T Get(int id)
+            public T Get(TId id)
             {
                 return database.Query<T>("select * from " + TableName + " where Id = @id", new { id }).FirstOrDefault();
             }
@@ -136,6 +136,13 @@ internal static List<string> GetParamNames(object o)
             }
         }
 
+		public class Table<T> : Table<T, int> {
+			public Table(Database<TDatabase> database, string likelyTableName)
+				: base(database, likelyTableName)
+			{
+			}
+		}
+
         DbConnection connection;
         int commandTimeout;
         DbTransaction transaction;