readme update

README.md

@@ -9,3 +9,26 @@ directory.
 
 Supports loading both plain file data, data embedded in `vpk` files and data
 embedded in `bsp` maps.
+
+## Usage
+
+```rust
+use tf_asset_loader::{Loader, LoaderError};
+
+fn main() -> Result<(), LoaderError> {
+    let loader = Loader::new()?;
+    if let Some(model) = loader.load("models/props_gameplay/resupply_locker.mdl")? {
+        println!("resupply_locker.mdl is {} bytes large", model.len());
+    }
+    Ok(())
+}
+```
+
+## Additional sources
+
+You can customize the sources the loader looks for files by using
+[ `Loader::add_source`](https://docs.rs/tf-asset-loader/latest/tf_asset_loader/struct.Loader.html#method.add_source).
+This supports folders on the filesystem,
+[vpk archives](https://crates.io/crates/vpk) or
+[Pack files](https://docs.rs/vbsp/latest/vbsp/data/struct.Packfile.html) from
+[bsp files](https://crates.io/crates/vbsp)

src/lib.rs

@@ -119,7 +119,7 @@ impl Loader {
 
     /// Add a new source to the loader.
     ///
-    /// This is intended to be used to add data from bsp files
+    /// This is mainly intended to be used to add data from bsp files, but can also be used to load from additional paths or vpks.
     pub fn add_source<S: AssetSource + Send + Sync + 'static>(&mut self, source: S) {
         self.sources.push(Arc::new(source))
     }