vector_view should be a type (probably a subtype of AbstractArray)

[stevengj]

The GSL vector_view type is pretty much totally redundant with the Julia SubArray type, so I would tend to not include it at all (issue #12).

However, if you are going to include it, you must define it as a type which contains a reference to the original Array that was used to construct it, as otherwise the latter may be garbage-collected by Julia, which would lead to a crash when GSL next tries to access the vector contents.

[jiahao]

Agreed, nix vector_view