Improves documentation (#13)

* Documents all env variables and adds an example project

* Adds godoc comments

* Fixed package naming issue

middleware/throttle.go

@@ -8,6 +8,7 @@ import (
 	"time"
 )
 
+// Throttle middleware takes a limit per minute and blocks any additional requests that go over this limit
 func Throttle(limit int) gin.HandlerFunc {
 	store := memory.NewStore()