readme: Add logo and more detailed build instructions.

README.md

@@ -1,10 +1,16 @@
-# Magnus
+<h1 align="center">
+  <img src="data/logo.png" alt="Magnus">
+  <br />
+  Magnus
+</h1>
 
-A very simple screen magnifier app for Ubuntu.
+<p align="center"><b>A very simple screen magnifier.</b></p>
 
 ![Magnus Screenshot](data/screenshot.png?raw=true)
 
-## Install
+<p align="center">Made with 💝 for <img src="https://raw.githubusercontent.com/anythingcodes/slack-emoji-for-techies/gh-pages/emoji/tux.png" align="top" width="24" /></p>
+
+## Building, Testing, and Installation
 
 ### Ubuntu
 
@@ -16,4 +22,17 @@ A [PPA for Magnus](https://launchpad.net/~flexiondotorg/+archive/ubuntu/magnus)
 
 ### Source
 
-    sudo python3 setup.py install
+You'll need the following dependencies:
+
+  * gir1.2-gdkpixbuf-2.0
+  * gir1.2-glib-2.0
+  * gir1.2-gtk-3.0
+  * python3
+  * python3-gi
+  * python3-setproctitle
+
+Run `setup.py` to build and install Magnus:
+
+```bash
+sudo python3 setup.py install
+```