Move display functionality into ImageView repository
Implement reslicing

This also makes a couple of fixes/improvements to slicing behavior
Complete update for has->haskey deprecation
Merge branch 'master' of github.com:timholy/Images.jl
Improve SliceDims API and permit dimindexing by name

This includes its use in permutedims(), too.
Finally, it fixes a bug in coords_spatial().
Add color conversion back, with modified API
ref -> getindex, assign -> setindex!
Small bugfixes to math and transpose
Update for parse_int->parseint
Add img[propertyname] syntax