Change Varargs to vectors or array

[TransGirlCodes]

BioSequences.jl/src/bioseq/site_counting/site_counting.jl

Line 158 in 45e5533

function count_pairwise{P<:Position,A<:NucAlphs,N}(::Type{P}, seqs::Vararg{BioSequence{A},N})

@bicycle1885 There was an issue or PR recently in which you recommended removing Varargs and just going with a general iterable.

I'm considering whether I should change the varargs in the signature to some other container type, perhaps add a parameter for AbstractArray like:

count_pairwise{P<:Position,A<:NucAlphs,C<:AbstractArray}(::Type{P}, seqs::C{BioSequence{A},N})

I already have a plan to cleanup the fast counting internals a bit and wondered if it was worth doing this at the same time.