Missing convert method to facilitate initialisation of fields of type SArray

[krcools]

The following attempt to construct a Polly fails

using StaticArrays

type Polly{N,T}
    data::SVector{N,T}
end

p = Polly{2,Float64}((1.0, 0.0))

As @andyferris pointed out on discourse this can be fixed by adding a conversion method from a tuple to an SVector.

[andyferris]

I was hoping to address these constructors for Julia v0.6. I'm hoping the new subtyping algorithm (or perhaps just a better understanding of dispatch rules) will help make reasoning about these things a bit easier...

[c42f]

This works on the latest version, so I assume Andy did get around to fixing it.