Add option to donate via Bitcoin.

README.md

@@ -5,34 +5,46 @@ _OpenTracks_ is a sport tracking application that completely respects your priva
 <table>
     <tr>
         <th>Free</th>
-        <th>Paid (same as free)</th>
         <th>Donations</th>
         <th>Translations</th>
     </tr>
     <tr>
-        <td>
+        <td align="center">
             <a href="https://f-droid.org/packages/de.dennisguse.opentracks">
                 <img alt="Get it on F-Droid" src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png" height="60" align="middle">
-                <br />
-                <img alt="OpenTracks version published on F-Droid" src="https://img.shields.io/f-droid/v/de.dennisguse.opentracks.svg" align="middle" >
             </a>
         </td>
-        <td>
+        <td align="center">
-            <a href="https://play.google.com/store/apps/details?id=de.dennisguse.opentracks.playstore">
-                <img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/static/images/badges/en_badge_web_generic.png" height="60" align="middle">
-            </a>
-        </td>
-        <td>
             <a href="https://liberapay.com/OpenTracks/donate">
                 <img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg" height="45" align="middle">
             </a>
         </td>
-        <td>
+        <td align="center">
             <a href="https://www.transifex.com/opentracks/opentracks/">
                 Transifex
             </a>
         </td>
     </tr>
+    <tr>
+        <td align="center">
+            <img alt="OpenTracks version published on F-Droid" src="https://img.shields.io/f-droid/v/de.dennisguse.opentracks.svg" align="middle" >
+        </td>
+        <td align="center">
+            <a href="bitcoin:BC1QCKPLS3LPJLCPYXZM66HCY65HNESAS9ZGACY6YC">
+                <img alt="bitcoin:BC1QCKPLS3LPJLCPYXZM66HCY65HNESAS9ZGACY6YC" src="promotion/donations-bitcoin.png" height="90" align="middle">
+            </a>
+        </td align="center">
+        <td></td>
+    </tr>
+    <tr>
+        <td></td>
+        <td align="center">
+            <a href="https://play.google.com/store/apps/details?id=de.dennisguse.opentracks.playstore">
+                <img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/static/images/badges/en_badge_web_generic.png" height="60" align="middle">
+            </a>
+        </td>
+        <td></td>
+    </tr>
 </table>
 
 ## Features: