Update readmes, add test

Author: gridbugs

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: test
+on: [push]
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        rust: [stable]
+    steps:
+    - uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: ${{ matrix.rust }}
+    - uses: actions/checkout@master
+    - run: |
+        cargo test --release
+        cargo test --release --all-features

README.md

@@ -9,7 +9,7 @@ CAW is a framework for building synthesizers as Rust programs.
 Here's a simple example that plays a 60Hz saw wave:
 ```toml
 # Cargo.toml
-...
+
 [dependencies]
 caw = { version = "0.4", features = ["interactive"] }
 ```
@@ -85,5 +85,5 @@ fn main() {
 There's a bunch of effects that can be chained onto signals. Here we'll add a
 chorus and reverb effect.
 
-See the examples in the [caw](caw) [caw_interactive](interactive) crates for
+See the examples in the [caw](caw) and [caw_interactive](interactive) crates for
 more complex examples.

caw/README.md

@@ -12,7 +12,7 @@ CAW is a framework for building synthesizers as Rust programs.
 Here's a simple example that plays a 60Hz saw wave:
 ```toml
 # Cargo.toml
-...
+
 [dependencies]
 caw = { version = "0.4", features = ["interactive"] }
 ```
@@ -88,5 +88,5 @@ fn main() {
 There's a bunch of effects that can be chained onto signals. Here we'll add a
 chorus and reverb effect.
 
-See the examples in the [caw](../caw) [caw_interactive](../interactive) crates for
+See the examples in the [caw](../caw) and [caw_interactive](../interactive) crates for
 more complex examples.

interactive/examples/keyboard_and_mouse_interactive.rs

@@ -41,7 +41,12 @@ fn sig(input: Input, channel: Channel) -> Sig<impl SigT<Item = f32>> {
 
 fn main() -> anyhow::Result<()> {
     env_logger::init();
-    let window = Window::builder().build();
+    let window = Window::builder()
+        .sane_default()
+        .visualization(Visualization::StereoOscillographics)
+        .line_width(2)
+        .scale(4.)
+        .build();
     let input = window.input();
     window.play_stereo(
         Stereo::new_fn_channel(|channel| sig(input.clone(), channel)),