Updating SLBookCoverCell
Updating SLBookBaseModel
Updating SLRestfulEngine
Updating SLMainViewController
updating SLBookCoverCell
Adding AsynImageView
Updating CollectionCell image class
Updating SLBookCoverCell
Updating MainViewController
Updating SLBookBaseModel
Updating SLBorHistoryBook
Updating SLHistoryCell
Updating SLRestfulEngine
Updating SLBorrowHistoryViewController
Updating SLBorHistoryCell
Adding NSCoding Method
Delete NSLog
Finish Login Method
Finish SLLoginViewController
Updating NavigationBar tintColor