Non-NaCl MainCall prepared, misc++

- ozCore
  * File::cp(), mv() & rm() ++
  * MainCall works for all platforms but currently disabled
New resizable and improved HashSet & HashMap

- ozCore
  * HashSet, HashMap
    + resizable
    + equivalence is now independent from ordering inside buckets
    + iterators emulate pointers to keys / pairs instead to Elem class
    + trim()