Updated documentation

Documentation/all_in_one.md

+# Example
+
+```csharp
+async Task AbstractCall() {
+    var client = new Client(
+        FitConnectEndpoints.Create(FitConnectEndpoints.EndpointType.Development),
+        "clientId", "clientSecret");
+
+    var success = await client.SendSubmissionAsync(new Submission());
+
+    var submissions = await client.GetSubmissionsAsync("destinationId");
+
+    foreach (var submission in submissions) Console.WriteLine(submission.Id);
+}
+
+```

Documentation/example.md → Documentation/detailed_calls.md

 # Example
 
-```csharp
-using FitConnect;
-using FitConnect.Models;
-```
-
-## The easy way to call the FitConnect API
-
-```csharp
-async Task AbstractCall() {
-    var client = new Client(
-        FitConnectEndpoints.Create(FitConnectEndpoints.EndpointType.Development),
-        "clientId", "clientSecret");
-
-    var success = await client.SendSubmissionAsync(new Submission());
-
-    var submissions = await client.GetSubmissionsAsync("destinationId");
-
-    foreach (var submission in submissions) Console.WriteLine(submission.Id);
-}
-
-```
-
-## The more verbose way to call the FitConnect API
-
-### The Fluent Sender Api call
-```csharp
-void FluentSenderCall() {
-    var client =
-        new Client(FitConnectEndpoints.Create(FitConnectEndpoints.EndpointType.Development),
-            logger: _logger);
-    client.Sender
-        .Authenticate(clientId, clientSecret)
-        .CreateSubmission(new Submission())
-        .UploadAttachments(new List<Attachment>())
-        .SendSubmission(new Metadata(), new Data());
-}
-```
-
-### Here to call the **Sender** interface
+## Sender
 
 ```csharp
 void DetailSenderCall() {
@@ -53,11 +15,9 @@ void DetailSenderCall() {
 
 ```
 
-### Here to call the **Subscriber** interface
+## Subscriber
 
 ```csharp
-
-
 async Task DetailSubscriberCall() {
     var subscriber =
         new Subscriber(
@@ -67,5 +27,4 @@ async Task DetailSubscriberCall() {
      ....
      */
 }
-
 ```
\ No newline at end of file

Documentation/documentation.md

@@ -2,6 +2,22 @@
 
 ## Introduction
 
+The SDK supports a high-level support as well as a low-level support for the
+FitConnect API and a fluent API.
+
+## All in one
+
+For not having to deal with the low-level API, the SDK provides a high-level support. This is
+done by the [All in one](./all_in_one.md) class.
+
+## Fluent Api
+
+[Fluent Api](./fluent_api.md)
+
+## Detailed calls
+
+[Detailed calls](./detailed_calls.md)
+
 ## Examples
 
 [Examples](./example.md)

Documentation/fluent_api.md

+# Example
+
+```csharp
+void FluentSenderCall() {
+    var client =
+        new Client(FitConnectEndpoints.Create(FitConnectEndpoints.EndpointType.Development),
+            logger: _logger);
+    client.Sender
+        .Authenticate(clientId, clientSecret)
+        .CreateSubmission(new Submission())
+        .UploadAttachments(new List<Attachment>())
+        .SendSubmission(new Metadata(), new Data());
+}
+```