Add a first cut readme

README.md

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+# Dependencies
+
+- [`flutter`](https://flutter.dev/docs/get-started/install)
+- [`gomobile`](https://godoc.org/golang.org/x/mobile/cmd/gomobile)
+- Copy `env.sh.example` to `env.sh` and update your `PATH` variable to expose both flutter and go bin directories
+
+    ```export PATH="$PATH:/path/to/go/bin:/path/to/flutter/bin```
+    
+# Formatting
+
+`flutter format` can be used to format the code in `lib` and `test` but it's default is 80 char line limit, it's 2020
+
+Use:
+```sh
+flutter format lib/ test/ -l 120
+``` 
+
+# Release
+
+Update `version` in `pubspec.yaml` to reflect this release, then
+
+## Android
+
+`flutter build appbundle --no-shrink`
+
+This will create an android app bundle at `build/app/outputs/bundle/release/`
+
+Upload the android bundle to the google play store https://play.google.com/apps/publish
+
+## iOS
+
+In xcode, Release -> Archive then follow the directions to upload to the app store. If you have issues, https://flutter.dev/docs/deployment/ios#create-a-build-archive
+