Adjusted heading levels

Author: Steppschuh

README.md

@@ -26,33 +26,31 @@ Replace `master-SNAPSHOT` with the a release version number or a commit hash to
 
 ### Overview
 
-This library provides all commonly used Bluetooth GATT server functionality through [RxJava][rxjava] powered interfaces. There's a default implementation avaialble for each of those interfaces, so that you don't have to manually deal with all the request and response handling that is usually required when providing Android's `BluetoothGattServerCallback`.
+This library provides all commonly used Bluetooth GATT server functionality through [RxJava][rxjava] powered interfaces. There's a default implementation available for each of those interfaces, so that you don't have to manually deal with all the request and response handling that is usually required when providing Android's `BluetoothGattServerCallback`.
 
 It also introduces a few wrappers to make it more convenient to work with the BLE related stuff, for instance:
 
 - `RxBleValue` instead of raw `byte[]` arrays with offsets
 - `RxBleServerRequest` and `RxBleServerResponse` instead of the overloaded callback parameters
 	- Further extended for characteristic and descriptor reads and writes
 
-### Usage
-
-#### GATT Server
+### GATT Server
 
 The `RxBleServer` interface provides the functionality of Android's `BluetoothGattServer`. It's capable of providing and advertising services as well as connecting and disconnecting clients.
 
 To get an instance of the default implementation, use the `ServerBuilder`.
 
 You can customize the default implementation by extending `BaseServer`.
 
-##### Providing & Advertising
+#### Providing & Advertising
 
-To actually open the server and make it visible to remote clients, there are two methods that you should subscribe to: `Completable provideServices()` and `Completable advertise(UUID)`.
+To actually open the server and make it visible to remote clients, there are two methods that you should subscribe to: `provideServices()` and `advertise(UUID)`.
 
-You can provide a GATT server without advertising any service UUID. You can also advertise a service UUID that you don't actually provide a GATT server for. While most of the time you might want to do both, that may not always be the case. You could, for instance, stop advertising while a given client is connected. For convenience, there's also a merged version: `Completable provideServicesAndAdvertise(UUID)`.
+You can provide a GATT server without advertising any service UUID. You can also advertise a service UUID that you don't actually provide a GATT server for. While most of the time you might want to do both, that may not always be the case. You could, for instance, stop advertising while a given client is connected. For convenience, there's also a merged version: `provideServicesAndAdvertise(UUID)`.
 
 These methods will return a `Completable` that never terminates (unless an error accurs, e.g. when Bluetooth is disabled). You need to manually dispose the `Completable` subscriptions to stop the server (e.g. when your application lifecycle comes to an end).
 
-#### GATT Services
+### GATT Services
 
 The `RxBleService` interface provides the functionality of Android's `BluetoothGattService`. It's basically just a container for one ore more characteristics.
 
@@ -68,7 +66,7 @@ RxBleService service = new ServiceBuilder(EXAMPLE_SERVICE_UUID)
 
 You can customize the default implementation by extending `BaseService`.
 
-#### GATT Characteristics
+### GATT Characteristics
 
 The `RxBleCharacteristic` interface provides the functionality of Android's `BluetoothGattCharacteristic`. It can hold a value, zero or more descriptors, permissions and properties.
 
@@ -88,7 +86,7 @@ RxBleCharacteristic characteristic = new CharacteristicBuilder(EXAMPLE_CHARACTER
 
 You can customize the default implementation by extending `BaseCharacteristic`.
 
-#### GATT Descriptors
+### GATT Descriptors
 
 The `RxBleDescriptor` interface provides the functionality of Android's `BluetoothGattDescriptor`. It can hold a value and permissions.
 
@@ -109,7 +107,7 @@ RxBleDescriptor descriptor = new CharacteristicUserDescription("Example characte
 
 You can customize the default implementation by extending `BaseDescriptor`.
 
-#### Value Providers
+### Value Providers
 
 Both `RxBleCharacteristic` and `RxBleDescriptor` extend the `RxBleSharedValueProvider` as well as the `RxBleClientValueProvider` interface. That means they have methods to get or set values, and to observe value changes (e.g. if set by a write request from a remote client).
 
@@ -127,7 +125,7 @@ valueProvider.getValueChanges(someClientOfInterest)
 
 Note that the difference between these two is not just a `.filter()` by device, different clients can actually read and write different values on the same `RxBleClientValueProvider`.
 
-#### Clients
+### Clients
 
 The `RxBleClient` interface provides the functionality of Android's `BluetoothDevice`. It represents a remote device that connected to the server. Client instances will be automatically created by the library for your once they start connecting.