Add README

Author: tsudoko

README.md

@@ -0,0 +1,14 @@
+Xshare
+======
+
+[Download APK][apk]
+
+Xshare lets you upload files via the share menu. If there's a [ShareX custom
+uploader][sxcu] (.sxcu) file for a given website, you can use it with Xshare.
+
+The default uploader is [uguu.se][uguu].
+
+[apk]:  https://github.com/tsudoko/xshare/releases/download/0.4/xshare.apk
+[sxcu]: https://getsharex.com/docs/custom-uploader
+[uguu]: https://uguu.se/
+