Update page 'Installation'

Installation.md

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+You need a recent machine with `go` [installed](https://golang.org/doc/install).
+
+> This package has not been tested under the version **1.10**.
+
+
+
+##### 1. Download and install the package
+
+```bash
+go get -u git.xdrm.io/go/aicra
+```
+
+It should now be available locally and available for your imports.
+
+
+
+##### 2. Compile the command-line builder
+
+You should then compile the project builder to help you manage your projects.
+
+```bash
+go install git.xdrm.io/go/aicra/cmd/aicra
+```
+
+
+
+> The executable `aicra` will be placed into your `$GOPATH/bin` folder, if added to your environment PATH it should be available as a standalone command in your terminal. If not, you can simply run `$GOPATH/bin/aicra` to use the command or create a symlink into `/usr/local/bin` for instance.