Move config.toml.example to the root dir

It's way more discoverable here.
diff --git a/README.md b/README.md
index a1f0186..b6ff6df 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@
     ```
 
     > ***Note:*** Install locations can be adjusted by copying the config file
-    > from `./src/bootstrap/config.toml.example` to `./config.toml`, and
+    > from `./config.toml.example` to `./config.toml`, and
     > adjusting the `prefix` option under `[install]`. Various other options, such
     > as enabling debug information, are also supported, and are documented in
     > the config file.