DOC -- add another paragraph note to ndarray.view docs

Since most numpy operations are not sensitive to underlying data
structure (C-ordered arrays vs fortran-ordered arrays, versus slices or
transposes of arrays, etc.), but structured-array views ARE sensitive to
that, it is worth saying it explicitly in the documentation.
DOC -- add another paragraph note to ndarray.view docs (cont'd)

More detail: Views are only sensitive to under-the-hood storage when
the dtype storage size has changed.
DOC: Add example showing how a view of a slice can misbehave
Merge pull request #2967 from sbyrnes321/master

DOC -- add another paragraph note to ndarray.view docs