add kannanenator solution (gophercises#16)

* quiz exercise part 1 and 2

* remove todo

* EOF newline

* actually EOF newline

students/kannanenator/main.go

@@ -0,0 +1,57 @@
+package main
+
+import "os"
+import "fmt"
+import "log"
+import "flag"
+import "time"
+import "encoding/csv"
+import "bufio"
+import "strings"
+
+func main() {
+
+	filenamePtr := flag.String("filename", "problems.csv", "file containing the set of problems")
+	limitPtr := flag.Int("limit", 30, "quiz time limit")
+
+	flag.Parse()
+
+	file, err := os.Open(*filenamePtr)
+	handleError(err)
+	defer file.Close()
+
+	csvReader := csv.NewReader(file)
+	rows, err := csvReader.ReadAll()
+	handleError(err)
+
+	numQs := len(rows)
+	numCorrect := 0
+
+	timer := time.NewTimer(time.Second * time.Duration(*limitPtr))
+	go func() {
+		<- timer.C
+		// when the timer ends, we kill the quiz
+		fmt.Println("\nTime is up")
+		os.Exit(0)
+	}()
+
+	consoleReader := bufio.NewReader(os.Stdin)
+	for idx, element := range rows {
+		q, a := element[0], element[1]
+		fmt.Print("Problem #", idx+1 ,": ", q, " = ")
+		input, _ := consoleReader.ReadString('\n')
+
+		// compare w/o whitespace
+		if strings.TrimSpace(input) == strings.TrimSpace(a) {
+			numCorrect++
+		}
+	}
+
+	fmt.Println("You got", numCorrect, "out of", numQs, "correct")
+}
+
+func handleError(err error){
+	if err != nil {
+		log.Fatal(err)
+	}
+}