readme update to direct folks to the book.

README.md

@@ -6,59 +6,10 @@ A crate that helps you make GBA games
 
 # First Time Setup
 
-[ketsuban](https://github.com/ketsuban) is the wizard who explained to me how to
-do this stuff.
-
-1) Install `devkitpro`. They have a graphical installer for Windows, or you can
-   use pacman or whatever for linux things I guess. The goal here, among other
-   things, is to have a `binutils` setup that's targeting `arm-none-eabi`. We'll
-   also use some of their tools that are specific to GBA development so if you
-   for some reason already have the appropriate `binutils` then you probably
-   still want devkitpro.
-   * On Windows you'll want something like `C:\devkitpro\devkitARM\bin` and
-     `C:\devkitpro\tools\bin` to be added to your PATH. I'm not sure on the
-     directories for other systems. If you know then file a PR with the info.
-
-2) Next we use `cargo install cargo-xbuild` to get that all setup.
-
-3) Create a binary project. We're going to want nightly rust for this, so if you
-   don't already have it set to default to nightly you should [set that
-   up](https://github.com/rust-lang-nursery/rustup.rs#the-toolchain-file) for
-   this project.
-
-4) Clone this repo. It has an appropriate `main.rs` that will draw three test
-   dots as well as other support files:
-  * crt0.s
-  * linker.ld
-  * thumbv4-none-agb.json
-  * build.rs
-
-5) Run `arm-none-eabi-as crt0.s -o crt0.o` to build the `crt0.s` into a `crt0.o`
-   file. You could theoretically to it only when `crt0.s` changes, but in out
-   `build.bat` file it's set to simply run every single time because it's a
-   cheap enough operation.
-
-6) Build with `cargo xbuild --target thumbv4-none-agb.json`
-  * The file extension is significant, and `cargo xbuild` takes it as a flag to
-    compile dependencies with the same sysroot, so you can include crates
-    normally. Well, crates that can run inside a GBA at least (Which means they
-    have to be `no_std`, and even `no_alloc`).
-  * This generates an ELF binary that some emulators can run directly (which is
-    helpful because it has debug symbols).
-
-7) Also you can patch up the output to be a "real" ROM file:
-  * `arm-none-eabi-objcopy -O binary target/thumbv4-none-agb/debug/gbatest target/output.gba`
-  * `gbafix target/output.gba`
-
-8) Alternately, you can use the provided `build.bat` file (or write a similar
-   `build.sh` file of course), which does all four steps above.
-
-9) Time to read the [Tonc](https://www.coranac.com/tonc/text/toc.htm) tutorial
-   and convert all the C code you see into rust code.
-   * Also of great importance and help is the
-     [gbatek](https://problemkaputt.de/gbatek.htm) document.
-   * In time we'll have our own book that's specific to rust and this crate and
-     all that, but until then you're gonna have to look at a bunch of C code.
+This crate requires a fair amount of special setup. All of the steps are
+detailed for you [in the 0th chapter of the
+book](https://rust-console.github.io/gba/ch0/index.html) that goes with this
+crate.
 
 # Contribution