Changes

**R0.4.1:CButton(will be done by Dimple)'''Completed but looks like a minor issue because of base class'''**R0.4.1:CValEdit(will be done by Chiyong)'''There is a minor issue'''**R0.4.1:CCheckMark(will be done by Jungmin)'''Completed'''**R0.4.1:CMenuItem(will be done by Mauli)'''Completed'''*'''Applcation''' '''Completed'''**Display frames and buttons(Dimple)'''Completed'''**Book structure(Chiyoung)'''Completed'''**Database class'''Completed'''***Header file(Chiyoung)'''Completed'''***Class skeleton(Chiyoung)'''Completed'''***Database class constructor(Dimple)'''completed''' ***read from db function(Dimple) '''completed'''***write to db function(Dimple)'''completed'''***go to record by number function(Dimple)'''completed'''***Add a new book(Dimple)'''completed'''***destructor for class(Dimple)'''completed'''***Mauli***Jungmin**Help function(Chiyoung)'''Completed'''***Referenced from framework testers**Display book detail(Chiyoung)'''Completed'''**Exit function(Chiyoung)'''Completed'''***Referenced from framework testers**Browse opened data file(Chiyoung)'''Completed'''***Goto next record '''Completed'''***Goto previous record '''Completed'''***Goto last record '''Completed'''***Goto first record '''Completed'''***Goto record by number '''Completed'''**Edit the record(Chiyoung) '''Completed'''***Save the edited record '''Completed'''***Cancel editing a record without saving '''Completed'''***Saving unsaved data on exit with prompt '''Completed'''