update readme for initial release

README.md

@@ -1,11 +1,41 @@
-# Sparrow
-Bitcoin Wallet & Transaction Editor
+# Sparrow Bitcoin Wallet
 
-To clone this project, use `git clone --recursive git@github.com:craigraw/sparrow.git`
+Sparrow is a modern desktop Bitcoin wallet application supporting most hardware wallets and built on common standards such as PSBT, with an emphasis on transparency and usability.
 
-## Various ways to hex dump a file without spaces:
-`xxd -p file | tr -d '\n'`
+More information (and release binaries) can be found at https://sparrowwallet.com. Release binaries are also available directly from [Github](https://github.com/sparrowwallet/sparrow/releases).
 
-`hexdump -ve '1/1 "%.2x"'`
+![Sparrow Wallet](https://sparrowwallet.com/assets/images/control-your-sends.png)
 
-`od -t x1 -An file | tr -d '\n '`
+## Building
+
+To clone this project, use `git clone --recursive git@github.com:sparrowwallet/sparrow.git`
+
+In order to build, Sparrow requires Java 14 to be installed. The release packages can be built using
+
+`./gradlew jpackage`
+
+## Running
+
+If you prefer to run Sparrow directly from source, it can be launched with
+
+`./gradlew run`
+
+Java 14 must be installed.
+
+## Configuration
+
+Sparrow stores it's configuration, log file and wallets in a location appropriate to the operating system:
+
+Platform | Location
+-------- | --------
+OSX      | ~/.sparrow
+Linux    | ~/.sparrow
+Windows  | %APPDATA%/Sparrow
+
+## Reporting Issues
+
+Please use the Issues tab above to report an issue. If possible, look in the sparrow.log file in the configuration directory for information helpful in debugging. 
+
+## License
+
+Sparrow is licensed under the Apache 2 software licence.