Fixed typos, improved grammar in features.html (#721)

pages/features.html

@@ -463,7 +463,7 @@ layout: default
 				<strong>New in 4.0:</strong> Define scriptable objects called resources
 				to describe characters, entities, and data structures in your game. Use
 				your custom objects directly in the editor by assigning them to nodes.
-				Resources come with high-level API to store and read them, and they support
+				Resources come with a high-level API to store and read them, and they support
 				every Godot type, including other resources.
 			</p>
 		</div>
@@ -591,7 +591,7 @@ layout: default
 			<h4>Master usability with a flexible GUI system</h4>
 			<p>
 				Build scalable and adaptive user interfaces with Godot's unique
-				GUI system. Created specifically to power layouts common to games
+				GUI system. Created specifically to power layouts common to games,
 				it is also capable of handling complex UI applications and tools.
 				<br><br>
 				<em>For an example of what Godot's UI system is capable of see the Godot editor itself!</em>
@@ -618,7 +618,7 @@ layout: default
 			<h4>Deliver your game to desktop and mobile</h4>
 			<p>
 				Develop and publish your project on any modern desktop platform.
-				Let everyone play your game with by deploying to web and mobile.
+				Let everyone play your game by deploying to web and mobile.
 				Make your game handle various forms of inputs and share the same
 				project between every release.
 			</p>
@@ -662,7 +662,7 @@ layout: default
 		<div class="card feature-card">
 			<h4>Find the logic behind any system in an open source codebase</h4>
 			<p>
-				No need to wait for a support team to respond, when you can read
+				No need to wait for a support team to respond when you can read
 				the source code. Godot is an open book, and you can figure out everything
 				that is not yet documented after a single <code>git checkout</code>.
 				If you find and fix an issue, we will appreciate a PR upstream too.