[README] Update dependencies information, explain how to use crush.

README.md

@@ -3,7 +3,7 @@ moonspeak - LÖVE game localization library
 
 **moonspeak** is a basic internationalization library for
 the [LÖVE](https://love2d.org/) engine.
-It makes your game easy to translate into multiple languages.
+It makes your game easy to translate to multiple languages.
 
 **moonspeak** does the following:
 
@@ -11,16 +11,55 @@ It makes your game easy to translate into multiple languages.
 * Allows selecting one of the many available languages.
 * Translates messages by id (and provides default fallback to English).
 
-Dependencies
+## Dependencies
-============
 
 **moonspeak** uses [df-serialize](https://git.doublefourteen.io/lua/df-serialize)
 to read the dictionary file.
 
-**df-serialize** is also available on [LuaRocks](https://luarocks.org/modules/1414codeforge/df-serialize).
+You may either doenload **df-serialize** manually and place it inside a `lib` subdirectory,
+or use [crush](https://git.doublefourteen.io/lua/crush)
+to do this for you.
 
-Documentation
+## Using crush to download moonspeak dependencies
-=============
+
+1. Clone this repository.
+
+```sh
+git clone https://git.doublefourteen.io/lua/moonspeak
+```
+
+2. Move to the repository root directory:
+
+```sh
+cd moonspeak
+```
+
+3. Resolve any dependency using **crush**.
+
+```sh
+lua crush.lua
+```
+
+You should now see a `lib` subdirectory containing the necessary dependencies.
+
+## Using crush in my library to depend on moonspeak
+
+1. Download the latest [crush.lua](https://git.doublefourteen.io/lua/crush/src/branch/master/crush.lua) file and
+   place it into your project root directory.
+
+2. Create a `.lovedeps` text file in your project's root containing the following dependency entry:
+
+```lua
+{
+    moonspeak = "https://git.doublefourteen.io/lua/moonspeak",
+
+    -- ...more dependencies, if necessary...
+}
+```
+
+Now any project using your library will be able to fetch `moonspeak` and its dependencies automatically.
+
+## Documentation
 
 Code is documented with [LDoc](https://github.com/lunarmodules/LDoc).
 
@@ -33,7 +72,6 @@ ldoc init.lua
 `ldoc` outputs to a local `doc` directory, open `index.html`
 with your favorite browser to read it.
 
-License
+## License
-=======
 
-See [LICENSE](LICENSE) for details.
+Zlib, See [LICENSE](LICENSE) for details.