Notes about formatters in readme (#209)

* Add small info regarding formatters into readme

* add nuget badge to readme

Author: Vadim Hatsura

README.md

@@ -1,12 +1,14 @@
-# Serilog.Sinks.Elasticsearch
+# Serilog.Sinks.Elasticsearch [![Build status](https://ci.appveyor.com/api/projects/status/bk367tcnx9qt2sjy/branch/master?svg=true)](https://ci.appveyor.com/project/serilog/serilog-sinks-elasticsearch/branch/master) [![NuGet Badge](https://img.shields.io/nuget/v/Serilog.Sinks.Elasticsearch.svg)](https://www.nuget.org/packages/Serilog.Sinks.Elasticsearch)
 
-[![Build status](https://ci.appveyor.com/api/projects/status/bk367tcnx9qt2sjy/branch/master?svg=true)](https://ci.appveyor.com/project/serilog/serilog-sinks-elasticsearch/branch/master)
+This repository contains two nuget packages: `Serilog.Sinks.Elasticsearch` and `Serilog.Formatting.Elasticsearch`.
 
 ## Table of contents
 
 * [What is this sink](#what-is-this-sink)
 * [Features](#features)
 * [Quick start](#quick-start)
+  * [Elasticsearch sinks](#elasticsearch-sinks)
+  * [Elasticsearch formatters](#elasticsearch-formatters)
 * [More information](#more-information)
   * [A note about fields inside Elasticsearch](#a-note-about-fields-inside-elasticsearch)
   * [A note about Kibana](#a-note-about-kibana)
@@ -30,6 +32,8 @@ The Serilog Elasticsearch sink project is a sink (basically a writer) for the Se
 
 ## Quick start
 
+### Elasticsearch sinks
+
 ```powershell
 Install-Package serilog.sinks.elasticsearch
 ```
@@ -88,6 +92,24 @@ With the appSettings configuration the `nodeUris` property is required. Multiple
 
 And start writing your events using Serilog.
 
+### Elasticsearch formatters
+
+```powershell
+Install-Package serilog.formatting.elasticsearch
+```
+
+The `Serilog.Formatting.Elasticsearch` nuget package consists of a several formatters:
+
+* `ElasticsearchJsonFormatter` - custom json formatter that respects the configured property name handling and forces `Timestamp` to @timestamp.
+* `ExceptionAsObjectJsonFormatter` - a json formatter which serializes any exception into an exception object.
+
+Override default formatter if it's possible with selected sink
+
+```csharp
+var loggerConfig = new LoggerConfiguration()
+  .WriteTo.Console(new ElasticsearchJsonFormatter());
+```
+
 ## More information
 
 * [Basic information](https://github.com/serilog/serilog-sinks-elasticsearch/wiki/basic-setup) on how to configure and use this sink.

sample/Serilog.Sinks.Elasticsearch.Sample/Serilog.Sinks.Elasticsearch.Sample.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>