[simple-scan] Update README.md

[Robert Ancell <rancell src gnome org>]

commit f01a7c5e280876be069d6260521ffb49907c62f5
Author: Robert Ancell <robert ancell gmail com>
Date:   Fri Aug 24 04:02:40 2018 +0000

    Update README.md

 README.md | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)
---
diff --git a/README.md b/README.md
index 82266b3..05fc907 100644
--- a/README.md
+++ b/README.md
@@ -3,20 +3,17 @@
 
 # Introduction
 
-This is the source code to *Simple Scan* - a simple GNOME document scanning
+This is the source code to *Simple Scan* — a simple GNOME document scanning
 application. Simple Scan allows you to capture images using [image
 scanners](https://en.wikipedia.org/wiki/Image_scanner) (e.g. flatbed
 scanners) that have suitable [SANE drivers](http://sane-project.org/) installed.
 
 ## Building from source
 
-Install the dependencies.
-
-Ubuntu/Debian:
+Install the dependencies (first line is Ubuntu/Debian, second is Fedora):
 ```
 $ sudo apt install git meson valac libgtk-3-dev libgusb-dev libcolord-dev libpackagekit-glib2-dev 
libwebp-dev libsane-dev gettext itstool
 ```
-Fedora:
 ```
 $ sudo dnf install -y meson vala gettext itstool gtk3-devel libgusb-devel colord-devel PackageKit-glib-devel 
libwebp-devel sane-backends-devel
 ```
@@ -24,6 +21,7 @@ $ sudo dnf install -y meson vala gettext itstool gtk3-devel libgusb-devel colord
 Get the source:
 ```
 $ git clone https://gitlab.gnome.org/GNOME/simple-scan.git
+$ cd simple-scan
 ```
 
 Build and run:
@@ -37,20 +35,20 @@ $ XDG_DATA_DIRS=install/share:$XDG_DATA_DIRS ./install/bin/simple-scan
 
 There is a --debug command line switch to enable more verbose logging:
 ```
-simple-scan --debug
+$ simple-scan --debug
 ```
 
 Log messages can also be found in the `$HOME/.cache/simple-scan` folder.
 
 If you don't have a scanner ready, you can use a virtual "test" scanner:
 ```
-simple-scan --debug test
+$ simple-scan --debug test
 ```
 
-Simple Scan works by using the SANE API to capture images. It chooses
-the settings it thinks are appropriate for what you are trying to do.
-Drivers have many options and are of differring quality - it is useful
-to work out if any issues are caused by Simple Scan or the drivers. To
+Simple Scan works by using the [SANE API](http://sane-project.org/html/) to
+capture images. It chooses the settings it thinks are appropriate for what you
+are trying to do. Drivers have many options and are of differring quality - it
+is useful to work out if any issues are caused by Simple Scan or the drivers. To
 rule out Simple Scan you can use the graphical tool (XSane) or the
 command line
 [scanimage](http://www.sane-project.org/man/scanimage.1.html) provided