Update constants, turn on debug, add time reset

1. delay LED stays on = 25s
2. delay after we reset = 2s
3. Add ZERO_TIME event for when we reset the time variable
4. Turn on debug
5. reset the time variable if we aren't currently timing (i.e., waiting
for a second beam to be tripped) and it is greater than 10,000,000. This
is somewhat arbitrary, but the unsigned long should hold around 4
billion so this isn't even close to the overflow.
6. Add debug event when we zero