README: add build instructions

Author: deltabeard

README.md

@@ -1,14 +1,16 @@
-<h1 align="center"><img src="http://i.imgur.com/pWWyVMO.png" alt="ctrmus icon"><br>ctrmus</h1>
-<p align="center">A music player for the Nintendo 3DS</p>
-<p align="center">Latest 3DSX/CIA/3DS download on <a href="https://github.com/deltabeard/ctrmus/releases">releases</a> page, using <a href="https://zxing.org/w/chart?cht=qr&chs=230x230&chld=L&choe=UTF-8&chl=https%3A%2F%2Fgithub.com%2Fdeltabeard%2Fctrmus%2Freleases%2Fdownload%2F0.4.12%2Fctrmus.cia">QR code</a>, or via titledb</p>
+<img align="right" alt="The ctrmus icon" src="meta/icon.png">
 
-### Features
+# ctrmus: a music player for the Nintendo 3DS
+
+The latest 3DSX/CIA/3DS download can be found on the <a href="https://github.com/deltabeard/ctrmus/releases">releases</a> page, or by scanning <a href="https://zxing.org/w/chart?cht=qr&chs=230x230&chld=L&choe=UTF-8&chl=https%3A%2F%2Fgithub.com%2Fdeltabeard%2Fctrmus%2Freleases%2Fdownload%2F0.4.12%2Fctrmus.cia">this QR code</a>.
+
+## Features
 * Plays PCM WAV, AIFF, FLAC, Opus, Vorbis and MP3 files.
 * Pause and play support.
 * Plays music via headphones whilst system is closed.
 * Ability to browse directories.
 
-### Controls
+## Controls
 L+R or L+Up: Pause
 
 L+B: Stop
@@ -25,15 +27,41 @@ Left & right = Move cursor skipping 13 files at a time.
 
 Start: Exit
 
-### Contributing
-Have a look at [CONTRIBUTING.md](https://github.com/deltabeard/ctrmus/blob/master/CONTRIBUTING.md) for some info and guidelines on contributing to the project.
+# Contributing
+
+I very much welcome a pull request from anyone wanting to contribute! Be it a small spelling mistake, a bug fix or otherwise.
+
+## Adding features
+Create an issue before you start work so that others know that your considering working on adding a feature or fixing a bug.
+
+## Pull requests
+Please consider the following when making a pull request.
+* Commit messages should be clear.
+* Code style should be consistent.
+
+If you're unsure whether to make a pull request, just make it. :smiley:
+
+## Compiling
+
+Build dependencies:
+- GNU Make
+- [makerom](https://github.com/3DSGuy/Project_CTR)
+- [bannertool](https://github.com/Steveice10/bannertool)
+- [devkitARM](https://devkitpro.org/wiki/Getting_Started), with the following packages installed:
+  - libctru
+  - 3ds-libmpg123
+  - 3ds-libopus
+  - 3ds-libopusfile
+  - 3ds-libogg
+  - 3ds-libvorbisidec
+  - 3ds-libsidplay
+
+To build, type `make` in the project folder.
 
 ### Planned features
 * Playlist support.
-* FFMPEG support.
 * Repeat and shuffle support.
 * Metadata support.
-* Gain support.
 
 #### Notes
 Due to limitations in [ctrulib](https://github.com/smealum/ctrulib/issues/328), only ASCII characters are displayed correctly. Other characters will appear garbled, but functionality is not affected.