updated missing punctuation in the README file.

Added  missing period( . ) in many places.
Added missing colon ( : ) in some places.

README.md

@@ -13,40 +13,40 @@ Visit [our documentation](doc/articles/intro.md) for more details.
 
 ## Prerequisites
 * [**Visual Studio 2017 15.5 or later**](https://visualstudio.microsoft.com/), with:
-    * **Universal Windows Platform component** installed
+    * **Universal Windows Platform component** installed.
 
-	* **Xamarin component** installed (for Android and iOS development)
+	* **Xamarin component** installed (for Android and iOS development).
 
-    * **ASP.NET/web component** installed, along with .NET Core 2.2 (for WASM development)
+    * **ASP.NET/web component** installed, along with .NET Core 2.2 (for WASM development).
 
 To easily create a multi-platform application:
-* Install the [Uno Solution Template Visual Studio Extension](https://marketplace.visualstudio.com/items?itemName=nventivecorp.uno-platform-addin)
+* Install the [Uno Solution Template Visual Studio Extension](https://marketplace.visualstudio.com/items?itemName=nventivecorp.uno-platform-addin).
 * Create a new C# solution using the **Cross-Platform App (Uno Platform)** template, from Visual Studio's **Start Page**.
 
 See the complete [Getting Started guide](https://platform.uno/docs/articles/get-started.html) for more information.
 
 For a larger example and features demo:
-* Visit the [Uno Gallery and Playground](https://github.com/nventive/Uno.Playground) repository
-* Try the [WebAssembly Uno Playground](https://playground.platform.uno) live in your browser
+* Visit the [Uno Gallery and Playground](https://github.com/nventive/Uno.Playground) repository.
+* Try the [WebAssembly Uno Playground](https://playground.platform.uno) live in your browser.
 
 # Uno Features
 * Supported platforms:
     * Windows (via the standard UWP Toolkit)
     * iOS and Android (via [Xamarin](https://www.visualstudio.com/xamarin/))
     * WebAssembly through the [Mono Wasm SDK](https://github.com/mono/mono/blob/master/sdks/wasm/README.md)
-* Dev loop
+* Dev loop:
     * Develop on Windows first using Visual Studio
     * [XAML Edit and Continue](https://blogs.msdn.microsoft.com/visualstudio/2016/04/06/ui-development-made-easier-with-xaml-edit-continue/) for live XAML edition on each key stroke
     * [C# Edit and Continue](https://docs.microsoft.com/en-us/visualstudio/debugger/how-to-use-edit-and-continue-csharp)
     * Validate on other platforms as late as possible
     * Experimental XAML Hot Reload for WebAssembly, iOS and Android
     * [Uno.UITest](https://github.com/unoplatform/Uno.UITest), a library to create Cross-Platform UI Tests for WebAssembly, iOS and Android.
-* Cross Platform Controls
+* Cross Platform Controls:
     * [Control Templating](https://docs.microsoft.com/en-us/windows/uwp/design/controls-and-patterns/control-templates)
     * [Data Templating](https://code.msdn.microsoft.com/Data-Binding-in-UWP-b5c98114)
     * [Styling](https://docs.microsoft.com/en-us/windows/uwp/design/controls-and-patterns/xaml-styles)
     * [Rich Animations](https://docs.microsoft.com/en-us/windows/uwp/design/motion/xaml-animation)
-* UWP Code Support
+* UWP Code Support:
     * [Windows Community Toolkit](https://github.com/nventive/Uno.WindowsCommunityToolkit)
     * [MVVM Light Toolkit](https://github.com/nventive/uno.mvvmlight)
     * [Microsoft XAML Behaviors](https://github.com/nventive/Uno.XamlBehaviors)
@@ -60,24 +60,24 @@ For a larger example and features demo:
     * [Rx.NET](https://github.com/reactiveui/Reactive.Wasm)
     * [ColorCode-Universal](https://github.com/nventive/Uno.ColorCode-Universal)
     * Any UWP project
-* Responsive Design
+* Responsive Design:
     * [Visual State Manager](https://docs.microsoft.com/en-us/uwp/api/Windows.UI.Xaml.VisualStateManager)
     * [State Triggers](https://blogs.msdn.microsoft.com/mvpawardprogram/2017/02/07/state-triggers-uwp-apps/)
     * [Adaptive Triggers](https://docs.microsoft.com/en-us/uwp/api/Windows.UI.Xaml.AdaptiveTrigger)
-* Platform Specific 
+* Platform Specific:
     * Native controls and properties via [conditional XAML](doc/articles/using-uno-ui.md#supporting-multiple-platforms-in-xaml-files)
     * Any of the existing Xamarin iOS/Android libraries available
-* Xamarin.Forms Renderers
+* Xamarin.Forms Renderers:
     * [Uno Platform WebAssembly Renderers for Xamarin.Forms](https://github.com/unoplatform/Uno.Xamarin.Forms.Platform)
 
 # Live WebAssembly Apps
 
 Here's a list of live apps made with the Uno Platform for WebAssembly.
 
-* The [Uno Platform Playground](https://playground.platform.uno) ([Source](https://github.com/nventive/Uno.Playground))
+* The [Uno Platform Playground](https://playground.platform.uno) ([Source](https://github.com/nventive/Uno.Playground)).
 * The [Uno Calculator](https://calculator.platform.uno), a simple yet powerful iOS/Android/WebAssembly C# port of the calculator that ships with Windows ([Source](https://github.com/unoplatform/calculator)). Also try the [pink theme](https://calculator.platform.uno/?theme=pink), the [iOS version](https://apps.apple.com/app/id1464736591) or the [Android version](https://play.google.com/store/apps/details?id=uno.platform.calculator).
-* The [Xaml Controls Gallery](https://xamlcontrolsgallery.platform.uno/) ([Source](https://github.com/nventive/Uno.Xaml-Controls-Gallery))
-* [SkiaSharp fork for the Uno Platform](https://skiasharp-wasm.platform.uno/), Skia is a cross-platform 2D graphics API for .NET platforms based on Google's Skia Graphics Library ([Source](https://github.com/unoplatform/Uno.SkiaSharp))
+* The [Xaml Controls Gallery](https://xamlcontrolsgallery.platform.uno/) ([Source](https://github.com/nventive/Uno.Xaml-Controls-Gallery)).
+* [SkiaSharp fork for the Uno Platform](https://skiasharp-wasm.platform.uno/), Skia is a cross-platform 2D graphics API for .NET platforms based on Google's Skia Graphics Library ([Source](https://github.com/unoplatform/Uno.SkiaSharp)).
 * The [Uno.WindowsCommunityToolkit](https://windowstoolkit-wasm.platform.uno/), ([Source](https://github.com/nventive/Uno.WindowsCommunityToolkit))
 * The [Uno.Lottie](https://lottie.platform.uno/), a sample that uses the [AnimatedVisualPlayer](https://docs.microsoft.com/en-us/uwp/api/microsoft.ui.xaml.controls.animatedvisualplayer) ([Source](https://github.com/nventive/Uno.LottieSample))
 * The [Uno.RoslynQuoter](http://roslynquoter-wasm.platform.uno/), a [Roslyn](https://github.com/dotnet/roslyn) based C# analysis tool ([Source](https://github.com/nventive/Uno.RoslynQuoter))