* Fixed a SplitPayment test * Deleted unnecessary function. * Improved PostDeliveryCrowdsale tests. * Improved RefundableCrowdsale tests. * Improved MintedCrowdsale tests. * Improved IncreasingPriceCrowdsale tests. * Fixed a CappedCrowdsale test. * Improved TimedCrowdsale tests. * Improved descriptions of added tests.
