set deployment target to 7.0
replace deprecated UI constants with NS variants
replace calls to deprecated modal view controller methods
re-add iPad as target
add iPad icon
adapt split view layout
remove rounded corners for left/right views
adapt iPad main window
adapt split view handling, show navigation bars
adapt card decks list view layout
adapt card deck list view layout
add new default image for iPad
increase the content size of popover controllers on iPad
adjust color for selected table cells in the card decks list view
adapt card editor for iPad
ignore events while adding a new card deck