Further support for IO objects

[kimikage]

I don't understand the history of this package, but this package handles Vector{UInt8} at a low level.
However, much of what this package does should already be provided at a high level by IO objects such as IOBuffer.

[kimikage]

Inflate.jl/src/Inflate.jl

Lines 255 to 263 in ed24b32

	length = getlength(data, v)
	distance = getdist(data)
	if length <= distance
	append!(out, @view out[(end - distance + 1):(end - distance + length)])
	else
	for i = 1:length
	push!(out, out[end - distance + 1])
	end
	end

One of the performance bottlenecks is the append! there. Handling variable length data is what IOBuffer is good at.

[GunnarFarneback]

This is the history: https://gist.github.com/GunnarFarneback/8254567

It was initially written ten years ago for Julia 0.2 because at the time it was too difficult to get libz working for Windows and it was much easier to write a Julia implementation. It was later converted to a package and the streaming support was added when LightGraphs wanted to make use of it.

[kimikage]

I showed an example of using IO objects in PR#22.
We can re-open this.