Rewrite the README, update the changelog and tweak CONTRIBUTING.md

Also optimize a few textures a tiny bit.

1 files changed, 67 insertions, 4 deletions

diff --git a/README.md b/README.md
index bf702fc..5b4877e 100644
--- a/README.md
+++ b/README.md
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 # More Ores
 
-More Ores for [Minetest](http://minetest.net), a free and open source infinite
+More Ores for [Minetest](https://www.minetest.net/), a free and open source infinite
 world block sandbox game.
 
-To install, just clone this repository into your "mods" directory.
+[**Forum topic**](https://forum.minetest.net/viewtopic.php?f=11&t=549)
 
-More Ores code is licensed under the zlib license, textures are by Calinou and are licensed under CC BY-SA 3.0 Unported.
+## Installation
 
-**Forum topic:** <https://forum.minetest.net/viewtopic.php?f=11&t=549>
+### Download the mod
+
+To install More Ores, clone this Git repository into your Minetest's `mods/`
+directory:
+
+```
+git clone https://github.com/minetest-mods/moreores.git
+```
+
+You can also
+[download a ZIP archive](https://github.com/minetest-mods/moreores/archive/master.zip)
+of More Ores. If you do so, you will need to extract the archive, then rename
+the resulting folder from `moreores-master` to `moreores` – this is
+**absolutely** necessary to do, else, it won't work!
+
+### Enable the mod
+
+Once you have installed More Ores, you need to enable it in Minetest.
+The procedure is as follows:
+
+#### Using the client's main menu
+
+This is the easiest way to enable More Ores when playing in singleplayer
+(or on a server hosted from a client).
+
+1. Start Minetest and switch to the **Local Game** tab.
+2. Select the world you want to enable More Ores in.
+3. Click **Configure**, then enable `moreores` by double-clicking it
+   (or ticking the **Enabled** checkbox).
+4. Save the changes, then start a game on the world you enabled More Ores on.
+5. More Ores should now be running on your world.
+
+#### Using a text editor
+
+This is the recommended way to enable the mod on a server without using a GUI.
+
+1. Make sure Minetest is not currently running (else, it will overwrite
+   the changes when exiting).
+2. Open the world's `world.mt` file using a text editor.
+3. Add the following line at the end of the file:
+
+```
+load_mod_moreores = true
+```
+
+If the line is already present in the file, then replace `false` with `true` on that line.
+
+4. Save the file, then start a game on the world you enabled More Ores on.
+5. More Ores should now be running on your world.
+
+## Version compatibility
+
+More Ores is currently primarily tested with Minetest 0.4.16.
+It may or may not work with newer or older versions. Issues arising in older
+versions than 0.4.16 will generally not be fixed.
+
+## License
+
+Copyright © 2011-2017 Hugo Locurcio and contributors
+
+- More Ores code is licensed under the zlib license, see
+  [`LICENSE.md`](LICENSE.md) for details.
+- Unless otherwise specified, More Ores textures are licensed under
+  [CC BY-SA 3.0 Unported](https://creativecommons.org/licenses/by-sa/3.0/).