Add ShowAll command to BooksUICommand
FeatureB: Add command string to BooksUICommand
FeatureB: Add IDString
FeatureBee: Add ShowIDString to BookUI.xaml.cs
Merge remote-tracking branch 'origin/FeatureBee' into FeatureB
FeatureA: BooksUICommands. Add comment
FeatureA:Verify John's change.
ADD: FeaureA and FeatureB