Switch from deprecated Distance.jl to Distances.jl

Switch from deprecated Distance.jl to Distances.jl

Switch from deprecated Distance.jl to Distances.jl
Merge branch 'master' of https://github.com/jeffreyrogers/kNN.jl

* 'master' of https://github.com/jeffreyrogers/kNN.jl:
  Switch from deprecated Distance.jl to Distances.jl
  Switch from deprecated Distance.jl to Distances.jl
  Switch from deprecated Distance.jl to Distances.jl