using the time library

now() is epoch time, without any setup, it's 0 when booting and runs
from there. As the time lib doesn't mess with ethernet interupts, it's
used to track time running and keeps bulb on as long has it need to be.
The bulb stays on while now() is < than bulbTimers[bulbindex] which is
epoch of order + ( size of tweet * multiplier )