Added missing renames:

libcollections:
    AbsEntries -> AbsIter, Entries -> Iter, MoveEntries -> IntoIter, MutEntries -> IterMut
    DifferenceItems -> Difference, SymDifferenceItems -> SymmetricDifference, IntersectionItems -> Intersection, UnionItems -> Union

libstd/hash/{table, map}:
    Entries -> Iter, MoveItems -> IntoIter, MutEntries -> IterMut

Also a [breaking-change].