FEATURE: Lap History functionality

[TheAngryRaven]

Problem

Its too much of a pain to record and save laps on the display side of the code.

Description

It would be nice to be able to pull a single lap time for display, it would also be nice to have the ability to display a list of laptimes after a race.

Proposed Solution

1. Create an array to store list
2. Create some simple API functions to retrieve this data

unsigned long getLapTime(int lapNumber);
unsigned long* getLapTimes();