The startTime could use some buffer

[GriffGreen]

I would highly recommend adding an hour or so to:
https://github.com/MonolithDAO/token/blob/a3857d8839befadff221e7ea1a4baa9d33bd6ba1/src/FirstSale.sol#L25

so that it reads

startTime = safeAdd(_time, 1 hour);

1 hour is my suggestion, but you can make it more :-D

This will give you time to verify the contract on etherscan and put the address on the website before the countdown expires and all that so that there is more of a fair launch, and less potential for scammers putting up a fake address and stealing people's money in the chaos that ensues in those first few minutes of the creation period.

Thank you, I am very excited about your project! Nice work!

Much love,
Griff