fixes #31 Two things. First the problem was simply that it didn't look for the value it was before the specified date now it uses the get data in range and so succeeds. Second when a value of zero is input all numbers before NaN. I left this as the behaviour because if a fund even becomes zero it should cease to exist altogether so we shouldn't have to deal with it
fixes #31 Two things. First the problem was simply that it didn't look for the value it was before the specified date now it uses the get data in range and so succeeds. Second when a value of zero is input all numbers before NaN. I left this as the behaviour because if a fund even becomes zero it should cease to exist altogether so we shouldn't have to deal with it

edegraff/FundTracker,edegraff/FundTracker