Finished up wrapper

README.md

@@ -1,2 +1,38 @@
 # go-holidayapi
-Official Go library for Holiday API
+Official Go library for [Holiday API](https://holidayapi.com)
+
+## Usage
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/joshtronic/go-holidayapi"
+)
+
+func main() {
+    hapi := holidayapi.NewV1("_MY_API_KEY_")
+
+    holidays, err := hapi.Holidays(map[string]interface{}{
+        // Required
+        "country": "US",
+        "year":    "2016",
+        // Optional
+        // "month":    "7",
+        // "day":      "4",
+        // "previous": "true",
+        // "upcoming": "true",
+        // "public":   "true",
+        // "pretty":   "true",
+    })
+
+    if err != nil {
+        // Error handling...
+    }
+
+    fmt.Println("%#v\n", holidays)
+}
+
+```
+