Updates headline to use capital letters for nouns

Author: froschdesign

docs/book/v1/api.md

@@ -128,7 +128,7 @@ $request = RequestFactory::fromGlobals(
 );
 ```
 
-### ServerRequestFactory helper functions
+### ServerRequestFactory Helper Functions
 
 - Since 1.8.0
 

docs/book/v1/custom-responses.md

@@ -180,7 +180,7 @@ $uri = $request->getUri();
 $response = new RedirectResponse($uri->withPath('/login'));
 ```
 
-## Creating custom responses
+## Creating custom Responses
 
 PHP allows constructor overloading. What this means is that constructors of extending classes can
 define completely different argument sets without conflicting with the parent implementation.

docs/book/v1/emitting-responses.md

@@ -1,4 +1,4 @@
-# Emitting responses
+# Emitting Responses
 
 > ### Deprecated
 >
@@ -29,7 +29,7 @@ $emitter = new Zend\Diactoros\Response\SapiEmitter();
 $emitter->emit($response);
 ```
 
-## Emitting ranges of streamed files
+## Emitting Ranges of streamed Files
 
 The `SapiStreamEmitter` is useful when you want to emit a `Content-Range`. As an
 example, to stream a range of bytes from a file to a client, the client can pass

docs/book/v1/serialization.md

@@ -32,7 +32,7 @@ the following static methods:
 The deserialization methods (`fromArray()`) will raise exceptions if errors occur while parsing the
 message.
 
-### Example usage
+### Example Usage
 
 Array serialization can be usesful for log messages:
 

docs/book/v1/usage.md

@@ -60,7 +60,7 @@ illustration of a possible implementation.)
 Server-side applications will need to marshal the incoming request based on superglobals, and will
 then populate and send a response.
 
-### Marshaling an incoming request
+### Marshaling an incoming Request
 
 PHP contains a plethora of information about the incoming request, and keeps that information in a
 variety of locations. `Zend\Diactoros\ServerRequestFactory::fromGlobals()` can simplify marshaling
@@ -94,7 +94,7 @@ in the name were renamed with underlines. By getting the cookies directly from t
 access to the original cookies in the way you set them in your application and they are send by the user
 agent.
 
-### Manipulating the response
+### Manipulating the Response
 
 Use the response object to add headers and provide content for the response.  Writing to the body
 does not create a state change in the response, so it can be done without capturing the return
@@ -116,7 +116,7 @@ $response = $response
     ->withAddedHeader('X-Show-Something', 'something');
 ```
 
-### "Serving" an application
+### "Serving" an Application
 
 > ### Deprecated
 >

docs/book/v2/api.md

@@ -126,7 +126,7 @@ $request = RequestFactory::fromGlobals(
 );
 ```
 
-### ServerRequestFactory helper functions
+### ServerRequestFactory Helper Functions
 
 In order to create the various artifacts required by a `ServerRequest` instance,
 Diactoros also provides a number of functions under the `Zend\Diactoros`

docs/book/v2/custom-responses.md

@@ -210,7 +210,7 @@ $uri = $request->getUri();
 $response = new RedirectResponse($uri->withPath('/login'));
 ```
 
-## Creating custom responses
+## Creating custom Responses
 
 PHP allows constructor overloading. What this means is that constructors of extending classes can
 define completely different argument sets without conflicting with the parent implementation.

docs/book/v2/migration.md

@@ -64,7 +64,7 @@ to provide these capabilities instead. Usage is similar, but the
 `RequestHandlerRunner` provides better error handling, and integration with
 emitters.
 
-### ServerRequestFactory methods
+### ServerRequestFactory Methods
 
 A number of public static methods have been removed from
 `ServerRequestFactory`. The following table details the methods removed, and

docs/book/v2/serialization.md

@@ -32,7 +32,7 @@ the following static methods:
 The deserialization methods (`fromArray()`) will raise exceptions if errors occur while parsing the
 message.
 
-### Example usage
+### Example Usage
 
 Array serialization can be usesful for log messages:
 

docs/book/v2/usage.md

@@ -60,7 +60,7 @@ illustration of a possible implementation.)
 Server-side applications will need to marshal the incoming request based on superglobals, and will
 then populate and send a response.
 
-### Marshaling an incoming request
+### Marshaling an incoming Request
 
 PHP contains a plethora of information about the incoming request, and keeps that information in a
 variety of locations. `Zend\Diactoros\ServerRequestFactory::fromGlobals()` can simplify marshaling
@@ -94,7 +94,7 @@ in the name were renamed with underlines. By getting the cookies directly from t
 access to the original cookies in the way you set them in your application and they are send by the user
 agent.
 
-### Manipulating the response
+### Manipulating the Response
 
 Use the response object to add headers and provide content for the response.  Writing to the body
 does not create a state change in the response, so it can be done without capturing the return