Added more readme details.

Author: Trent Guillory

README.md

@@ -1,3 +1,44 @@
 # SnapToScroll
 
-A description of this package.
+Drop-in container view for horizontal snapping. 
+
+## Getting Started
+
+Using `SnapToScroll` is straightforward. There's only two requirements:
+
+1. Replace `HStack` with `HStackSnap`
+2. Add `GeometryReaderOverlay` to your view.
+
+An example:
+
+```swift
+
+HStackSnap(leadingOffset: 16) {
+
+    ForEach(modelArray) { viewModel in
+
+        myView(viewModel: viewModel)
+            .frame(maxWidth: 250)
+            .overlay(GeometryReaderOverlay(id: viewModel.id))
+        }
+    }
+}
+                    
+```
+For more examples, see `SnapToScrollDemo/ContentView.swift`.
+
+## Options
+
+`HStackSnap` comes with two customizable properties:
+
+- `leadingOffset`: The leading padding you'd like each element to snap to.
+- `coordinateSpace`: Option to set custom name for the coordinate space, in the case you're using multiple `HStackSnap`s of various sizes.
+
+## Limitations
+
+1. If your child views are designed to take up all available horizontal space, they'll expand beyond the visible view. Prevent this with `.frame(maxWidth: x)`
+2. `HStackSnap` is currently designed to work with static content.
+3. At the moment, `HStackSnap` offers snapping to the leading edge only. If you'd like to offer a PR that adds support for `.center` and / or `.trailing`, I'd love to look it over!
+
+## How it Works
+