Version 0.3.0

• zig: all functions that creates a new NDArray are prefixed with init,
  ex. initArange(...). In that way, it is easy to remember that it
  requires a deinit and also that they can not be chained.
• ndaray_logical... functions have been renamed to
  ndarray_new_logical... Also ndarray_where has been renamed to
  ndarray_new_where to be clear that they are allocating memory that
  must be deallocated.
• Comments in code improved to include examples.
• Site documentation improved