updated readme

Author: William Vabrinskas

README.md

@@ -10,3 +10,37 @@
 A native SwiftUI calendar component.
 
 <img width="300" src="images/example.png"> 
+
+# Usage
+ This package contains a SwiftUI view that will generate the above view. It's very simple to do. 
+
+ Create a `MonthView` and `MonthViewModel`. In the example below we are using the `.mock()` initializer to create a mock view model for the `MonthView`.
+ ```
+ var body: some View {
+   let vm = MonthViewModel.mock()
+
+   MonthView(viewModel: vm) { day in
+       print("Day: \(day) selected")
+   }
+ }
+ ```
+
+ The call back method is triggered when a day is tapped in the view. This returns the day as a number.
+
+## MonthViewModel
+
+### Initializer parameters:
+  - `model: MonthModel` The model that contains all the month data.
+  - `font: Font` Font of the whole view
+  - `linePadding: CGFloat` Padding between each week in the month
+  - `titleSize: Double` The size of the current month and year
+  - `selectedYear: Int` The currently selected year
+  - `selectedDay: Int` The currently selected day
+  - `showMonthTitle: String` A boolean value that 
+
+## MonthModel
+
+### Initializer parameters:
+- `name: String` Name of the month
+- `number: Int` Number of the month
+- `days: [DayModel]` Array of `DayModel`s for the days of the month