Add coursier based installation instructions

docs/01.md

@@ -5,27 +5,25 @@ out: setup.html
 Setup
 -----
 
-You can install Giter8 and other Scala command line tools with
-[Conscript][cs]. This will setup Conscript in `~/.conscript/bin/cs`:
+#### Coursier
 
-    curl https://raw.githubusercontent.com/foundweekends/conscript/master/setup.sh | sh
+Giter8 and other Scala command line tools can be installed using [Coursier](https://get-coursier.io/). 
+See the coursier [installation instruction](https://get-coursier.io/docs/cli-installation) to add it to your path.
+Once `cs` is on your path, you can install giter8 with this command:
 
-(See [Conscript's readme][cs] for a non-unixy option.) Once `cs` is
-on your path, you can install (or upgrade) giter8 with this command:
+    \$ cs install giter8
 
-    cs foundweekends/giter8
+and update it using:
 
-[cs]: http://www.foundweekends.org/conscript/setup.html
+    \$ cs update g8
 
-To make sure everything is working, try running `g8` with no
-parameters. This should download giter8 and its dependencies, then print
-a usage message.
+#### Manual
 
-When it's time to upgrade to a new version of giter8, just run the
-same `cs` command again.
+It's possible to manually download and install giter8 directly from Maven Central:
 
-Giter8 is also installable with the OS X package manager [Homebrew][]:
+    \$ curl https://repo1.maven.org/maven2/org/foundweekends/giter8/giter8-bootstrap_2.12/0.13.1/giter8-bootstrap_2.12-0.13.1.sh > ~/bin/g8
+    \$ chmod +x ~/bin/g8
 
-    \$ brew update && brew install giter8
+Replace `~/bin/` with anything that is on your `PATH`. To make sure everything is working, try running `g8` with no
+parameters, 
 
-[Homebrew]: https://brew.sh