Proposed changes to the class gift agreement for endowment

Before we can endow our class gift it's necessary to clarify a few things in the current agreement. For the most part these changes fix minor wording or grammatical errors. 

The one material change is the addition of the following to Section 2, ii.

> If, at any time, due to investment losses, the fund does not have any accumulated earnings, no payout will be distributed for that year.