Add sample test inputs and outputs for tasks 1 to 5

inputs/task_1_sample.in

+10

inputs/task_2_sample.in

+1000003967

inputs/task_3_sample.in

+39

inputs/task_4_sample.in

+12345678912345678912345678987654321987654321987654321

inputs/task_5_sample.in

+100
+18	14	49	79	5
+75	90	75	8	6
+61	27	51	57	14
+7	49	12	7	19
+47	41	38	1	51
+96	63	43	88	39
+92	17	6	61	83
+35	28	73	100	54
+30	72	52	15	8
+71	50	52	75	11
+69	62	83	39	86
+12	98	11	52	4
+15	100	61	98	73
+28	67	98	79	32
+94	5	2	17	4
+64	17	64	24	86
+47	64	55	60	15
+48	23	10	8	77
+100	65	42	16	68
+4	37	28	23	48
+13

outputs/task_1_sample.out

+1
+4
+9
+16
+25
+36
+49
+64
+81
+100

outputs/task_2_sample.out

+Prime!

outputs/task_3_sample.out

+0
+1
+1
+2
+3
+5
+8
+13
+21
+34
+55
+89
+144
+233
+377
+610
+987
+1597
+2584
+4181
+6765
+10946
+17711
+28657
+46368
+75025
+121393
+196418
+317811
+514229
+832040
+1346269
+2178309
+3524578
+5702887
+9227465
+14930352
+24157817
+39088169

outputs/task_4_sample.out

+A man, a plan, a canal -- Panama.

outputs/task_5_sample.out

+83