Submitted by cmichel
The TWAPOracle.getRate function simply performs an integer division to compute the rate.
It should first be scaled by some value, for example, 1e18.
The rate has no decimal precision and if tUSDInVader > tUSDInUSDV, the rate will always be zero.
The usdvtoVader and vaderToUsdv functions will return incorrect values.
SamSteinGG (Vader) confirmed
