Haskell Platform proposal: Add the vector package

[Roman Leshchinskiy]

Mark Lentczner wrote:
> If we don't, please, let's take these out of the package before
> committing it to the platform (where we have to make a commitment to the
> API).

I know I'm woefully uninformed about the platform requirements but this
caught my eye. What exactly is the commitment to the API that the platform
requires?

Roman