Updating iSYSULibrarySLBorrowHistoryViewController
Updating SLBorrowCell
Adding SLBorrowCell Identifier
Updating SLBorrowCell
Adding RestfulEngine
Updating SLBorrowHistoryViewController
Updating SLBorrowHistoryViewController, navigationbar tintColor
Updating SLBookDetailViewController
Delete Code
Revert SLBorrowCell
Merge pull request #3 from ChilokWang/master

9.18更新了SLBorrowListTableView
9.18refresh