There are some aspects of getindex.
Let A is a n-dimensional array, say 4-dimensional with size(A) == (2,3,2,2),

• Dimensions left out get flattened into the last indexed dimension, so for example
  A[i, k]==A[i,:,:,:][k] for k in 1:12
  This seems to be a consistent generalization of A[:] transforming the array to a vector.
• Also additional indexes of the form 1, : and equivalent 1:1 (additional to the n dimensions) can be provided. For example
  A[2,3,2,2, 1, 1] ~ Int64 A[2,3,2,2, :, 1] ~ 1x1x1x1x1 Array{Int64,5}
  (In both cases as usual the trailing integer-indexed dimension are removed)

Which behaviors are desired, which are artifacts from the implementation, which should be documented?