homepage: reword Android APK

also add a full stop at one sentence in "and more..."

index.html

@@ -65,7 +65,7 @@ permalink: /index.html
                 </div>
                 <div class="card col feature-icon">
                     <img src="/img/android-sys.svg">
-                    <h3>Stack on Android APK</h3>
+                    <h3>Stack as Android APK</h3>
                     <p>For advanced users, Stack Wallet is available on Android APK.</p>
                     <a href="https://github.com/cypherstack/stack_wallet/releases/latest">
                         Download Stack
@@ -214,7 +214,7 @@ permalink: /index.html
                             <p>Custom made backup capabilities mean you can safely and securely restore ALL of yours wallets in two easy steps.</p>
                         </div>
                         <div class="col">
-                            <p>Save multiple cryptocurrency addresses under one contact and assign an emoji</p>
+                            <p>Save multiple cryptocurrency addresses under one contact and assign an emoji.</p>
                         </div>
                         <div class="col">
                             <p>Testnet support: Most coins we support come with their testnet alternatives also. Simply enter advanced mode.</p>