Add solution for Day 1

one/main.go

@@ -1,16 +1,24 @@
 package one
 
+import "fmt"
+
 type One struct {
+	radar radar
 }
 
 func Init(filepath string) *One {
-	return nil
+	one := &One{
+		radar: radar{},
+	}
+
+	one.radar.scan(filepath)
+	return one
 }
 
 func (d *One) Answer() string {
-	return "Hello"
+	return fmt.Sprintf("There were %d increases in depth", d.radar.depthIncreases())
 }
 
 func (d *One) FollowUp() string {
-	return "World!"
+	return fmt.Sprintf("There were %d increases in depth when sampling a window", d.radar.windowedDepthIncreases())
 }