Add titel, description and images for fastlane (and F-Droid) (#564)

* Add titel, description and move images for fastlane (and F-Droid)

* Replace app title with multi-account feature in the short description

* Add feature list to full_description.txt

README.md

@@ -1,7 +1,7 @@
 [![Build Status](https://www.bitrise.io/app/55b2f0c77c4bba74/status.svg?token=elUl9fieM5K34iLRL0rpoA&branch=master)](https://www.bitrise.io/app/55b2f0c77c4bba74)
 # Tusky
 
-![](/assets/tusky_logo.png)
+![](/fastlane/metadata/android/en-US/images/icon.png)
 
 Tusky is a beautiful Android client for [Mastodon](https://github.com/tootsuite/mastodon). Mastodon is a GNU social-compatible federated social network. That means not one entity controls the whole network, rather, like e-mail, volunteers and organisations operate their own independent servers, users from which can all interact with each other seamlessly.
 

fastlane/metadata/android/en-US/full_description.txt

@@ -0,0 +1,14 @@
+Tusky is a client for Mastodon, a free and open-source social network server. Share words, photos, and videos with folks!
+
+• Material Design
+• Most Mastodon APIs implemented
+• Multi-Account support
+• Dark and light theme with the possibility to auto-switch based on the time of day
+• Drafts – compose toots and save them for later
+• Completely open-source – no non-free dependencies like Google services
+
+Mastodon is decentralized, meaning anyone can run Mastodon and participate in the social network seamlessly.
+
+To learn more about Mastodon, visit https://joinmastodon.org/
+
+Tusky is also itself open-source, it's source code is available at https://github.com/Vavassor/Tusky

fastlane/metadata/android/en-US/short_description.txt

@@ -0,0 +1 @@
+A multi account client for the social network Mastodon

fastlane/metadata/android/en-US/title.txt

@@ -0,0 +1 @@
+Tusky