Readme update (#187)

* Updated README.md and installation files

* Updated links

* Corrected links to point to latest version

* Added more README fixes

* Added Google Play address

* Corrected grammar

* Small fix for link

* Editing

* Added some improvements

* Update README.md

Co-authored-by: El-Hassan Wanas <wanas@leastauthority.com>

* Adjusted height

* Fix logo url

Co-authored-by: meejah <meejah@meejah.ca>
Co-authored-by: El-Hassan Wanas <wanas@leastauthority.com>

README.md

@@ -1,5 +1,5 @@
 <h1 align="center">
-  <img src="https://github.com/LeastAuthority/destiny/raw/readme-update/assets/images/intro-logo.png" height="150" alt="Destiny">
+  <img src="https://github.com/LeastAuthority/destiny/raw/main/assets/images/intro-logo.png" height="150" alt="Destiny">
 </h1>
 
 # Cross-platform Magic Wormhole graphical client