Update README.md

Author: bdbai

README.md

@@ -1,8 +1,24 @@
 # First UWP in Rust
+<a href='https://www.microsoft.com/store/apps/9PKF8HP44J2H?cid=storebadge&ocid=badge'><img src='https://developer.microsoft.com/en-us/store/badges/images/English_get-it-from-MS.png' alt='English badge' style='width: 284px; height: 104px;'/></a>
+
 The first Universal Windows Platform app written in pure Rust.
 
 **Note: this project is an early-stage experiment. Code quality is not guaranteed. Crashes or memory leak may occur.**
 
+## What have been done
+- Initialize Application during launch activation
+- Metadata provider to work with Frame navigation
+- Load XAML (.xbf) contents
+- Implementation of IComponentConnector to receive XAML `x:Name`s and event handlers
+- Weak references (translated from C++/WinRT projects)
+- Implementation of ICustomPropertyProvider for XAML binding support (`{Binding}` style)
+- Pass Windows App Cert Kit (WACK) and distribute from Microsoft Store
+
+## What yet to be done
+- Idiomatic and safe Rust implementation (let's wait for https://github.com/microsoft/winrt-rs/issues/81)
+- Generate .xbf file (see https://github.com/microsoft/winrt-rs/issues/306#issuecomment-670046333)
+- `{x:Bind}`-style binding (too much boilerplate code)
+
 ## Build and Run
 ```powershell
 # Build the project using x86_64-pc-windows-msvc default target
@@ -11,26 +27,31 @@ cargo build
 # Register the package layout
 Add-AppxPackage -Register AppxManifest.xml
 
-# Then click "First UWP in rs" in your Start Menu
+# Then launch "First UWP in Rust" in your Start Menu
 ```
 
+## Screenshots
+![MainPage on PC](images/PC-MainPage.png?raw=true)
+
+![MainPage on Windows Phone (portrait)](images/WP-MainPage-Portrait.png?raw=true)
+
 ## Cross compilation and Packaging
-The default targets `*-pc-windows-*` has some link options unsuitable for UWP applications. A package that contains executable files generated with such target fails Windows App Cert Kit (WACK) in terms of `AppContainerCheck` and unsupported APIs used. To pass WACK, `*-uwp-windows-*` targets should be used.
+The default targets `*-pc-windows-*` has some link options unsuitable for UWP applications. A package that contains executable files generated with such target fails WACK in terms of `AppContainerCheck` and unsupported APIs used. To pass WACK, `*-uwp-windows-*` targets should be used.
 
 <del>[Xargo](https://github.com/japaric/xargo) is recommended for cross-compilation in this project. Using Xargo, it is not necessary to build the whole Rust toolchain in order to consume tier-3 targets.</del> Xargo is not maintained any more. A more recommended way is to use [`build-std`](https://doc.rust-lang.org/cargo/reference/unstable.html#build-std) feature in cargo.
 
 Follow the steps below in `powershell` to build and generate a `.appx` package:
 1. Set up Rust nightly toolchain for this project
 ```powershell
 rustup toolchain install nightly-2020-08-15
-rustup override set nightly
+rustup override set nightly-2020-08-15
 rustup component add rust-src
 ```
 2. Build with std-aware cargo
 ```powershell
 cargo build --release -Z build-std=std,panic_abort --target x86_64-uwp-windows-msvc
 ```
-`i686-uwp-windows-msvc`, `thumbv7a-uwp-windows-msvc` and `aarch64-uwp-windows-msvc` targets can be used for x64, ARM and ARM64. `panic_abort` needs to be specified explicitly due to https://github.com/rust-lang/wg-cargo-std-aware/issues/29 .
+`i686-uwp-windows-msvc`, `thumbv7a-uwp-windows-msvc` and `aarch64-uwp-windows-msvc` targets can be used for x64, ARM and ARM64. `panic_abort` needs to be specified explicitly due to https://github.com/rust-lang/wg-cargo-std-aware/issues/29.
 
 3. Set up environment variables before consuming Windows SDK command line tools
 ```powershell