Update documentation

DETAILS.md

@@ -0,0 +1,3 @@
+# DETAILS
+
+TODO

INSTALL.md

@@ -0,0 +1,35 @@
+# Installation
+
+## Step 1: Authentication Token
+
+In order to access start.gg's API, you must first have an authentication token
+linked to your account. Instructions for generating one can be found in the
+[developer API docs](https://developer.start.gg/docs/authentication).
+
+Once you have an auth token, it must be provided to StartGGElo. In order, the
+program checks for a token in:
+
+- A command-line flag `--auth`.
+- An environment variable `AUTH_TOKEN`,
+- A file `auth.txt` within the config directory (see the [[README]] for a list
+  of directories in each OS).
+
+## Step 2: Dependencies
+
+StartGGElo is written in Rust, so install the [Rust
+compiler](https://www.rust-lang.org/tools/install).
+
+In addition, StartGGElo needs these run-time dependencies:
+
+- [OpenSSL](https://www.openssl.org/)
+- [SQLite](https://www.sqlite.org/)
+
+## Step 3: Compiling
+
+Once you have all the necessary dependencies, build and install StartGGElo by
+running the following command:
+
+``` sh
+cargo install --git https://github.com/kiana-S/StartGGElo
+```
+

README.md

@@ -6,23 +6,35 @@ generate and maintain [Elo ratings](https://wikipedia.org/wiki/Elo_rating_system
 Once Elo ratings are generated, StartGGElo can be used to generate ranking lists, predict the
 probability of a player winning a match, generate seedings for future tournaments, and more.
 
-> **Note**<br>
+> **Warning**<br>
 > StartGGElo is still under development; currently, it only supports generating player ratings.
 
 ## Installation
 
-TODO
+*For more information, see the [installation page](INSTALL.md).*
+
+Build and install StartGGElo using `cargo`:
+
+``` sh
+cargo install --git https://github.com/kiana-S/StartGGElo
+```
+
+Alternatively, if you use Nix:
+
+``` sh
+nix profile install github:kiana-S/StartGGElo
+```
 
 ## Configuration
 
-StartGGElo stores its rating database in its config directory, which is located at:
+StartGGElo stores its rating databases in its config directory, which is located at:
 
 - Windows: `%APPDATA%\Roaming\ggelo`
 - MacOS: `~/Library/Application Support/ggelo`
 - Linux: `~/.config/ggelo`
 
 This directory also contains StartGGElo's config file, which defines how it calculates its ratings.
-There are few reasons to access this directory directory, but you can if you want to transfer your
+There are few reasons to access this directory directly, but you can if you want to transfer your
 data between computers.
 
 ## Elo system basics

src/queries.rs

@@ -17,7 +17,7 @@ pub fn get_auth_key(config_dir: &Path) -> Option<String> {
     use std::env::{var, VarError};
     use std::fs::read_to_string;
 
-    match var("AUTH_KEY") {
+    match var("AUTH_TOKEN") {
         Ok(key) => Some(key),
         Err(VarError::NotUnicode(_)) => panic!("Invalid authorization key"),
         Err(VarError::NotPresent) => {