Update installation docs, release new installer

[ci skip]

README.md

@@ -19,12 +19,41 @@ See [CHANGELOG.md](./CHANGELOG.md).
 
 ## Install
 
+Install the latest stable release:
+
 ```sh
 curl https://install.abra.autonomic.zone | bash
 ```
 
+or the bleeding-edge development version:
+
+```sh
+curl https://install.abra.autonomic.zone | bash -s -- --dev
+```
+
 The source for this script is [here](./installer/installer).
 
+## Update
+
+Run `abra upgrade` to automatically download and install the latest release
+version.
+
+To update the development version, run
+
+```sh
+cd ~/.abra/src
+git pull
+```
+
 ## Hack
 
 It's written in Bash! Just open up the `abra` file and start hacking. Then you can run it in place with `./abra`. The command-line interface is generated via [docopt](http://docopt.org/). If you add arguments then you need to run `make docopt` ro regenerate the parser.
+
+Please remember to update the [CHANGELOG](./CHANGELOG) when you make a change.
+
+To deploy a new version of the installer scripts:
+
+```sh
+cd installer
+DOCKER_CONTEXT=swarm.autonomic.zone docker stack deploy -c compose.yml abra-installer-script
+```