The task of the InterestManager is to invest Dai into an interest-generating protocol. Currently this is implemented as InterestManagerCompound which invests into Compound.
invest: Invests Dai to generate interest
uint amount: The amount of Dai to invest
returns: The amount of cDai received
redeem: Redeems Dai
address recipient: The address to receive the redeemed Dai
uint amount: The amount of Dai to redeem
returns: The amount of burned cDai
redeemInvestmentToken: Redeems Dai, but with the amount parameter being the amount of cDai to convert instead of the amount of Dai to redeem.
accrueInterest: Calls the underlying protocol to update the accrued interest which in this case is cDai.accrueInterest()
withdrawComp: Transfers COMP tokens to the compRecipient
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