WIP: add unsafe_convert to pointer

[oxinabox]

This is part of trying to get this wo work with distributions

[codecov]

Codecov Report

Merging #102 into master will increase coverage by 0.10%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #102      +/-   ##
==========================================
+ Coverage   89.18%   89.29%   +0.10%     
==========================================
  Files           9        9              
  Lines         296      355      +59     
==========================================
+ Hits          264      317      +53     
- Misses         32       38       +6     

Impacted Files	Coverage Δ
src/wrapper_array.jl	89.23% <66.66%> (-5.22%)	⬇️
src/functions_dims.jl	100.00% <0.00%> (ø)
src/name_operations.jl	88.88% <0.00%> (ø)
src/name_core.jl	92.98% <0.00%> (+1.31%)	⬆️
src/broadcasting.jl	57.57% <0.00%> (+1.32%)	⬆️

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[mcabbott]

Bump?

[oxinabox]

I never ended up needing this, so never wrote tests so can't merge it

[mcabbott]

Perhaps just this?

nda = NamedDimsArray(rand(2,2), (:x, :y))
@test pointer(nda) == pointer(parent(nda))

This passes without the method I suggested, i.e. with only Base.unsafe_convert defn, so perhaps that's enough?