update for new vectorization roadmap

[stevengj]

It might be good to think about how this interacts with JuliaLang/julia#16285. Hopefully, when the rest of that roadmap is implemented in 0.6, the Devec package won't be needed too much.

In the meantime, it might be nice to work with the new syntax... all @devec has to do is to change a .+ b into (+).(a,b) and similar for other binary operations, and loop fusion will automatically occur in Julia 0.5 (assuming the user calls other functions as foo.(args...) and does x .= ... assignment).

[blakejohnson]

This seems like a nice idea.

[ChrisRackauckas]

Maybe it would even be good to start adding depwarns?

[StefanKarpinski]

I've wondered if we should have a @. macro that sticks dots on everything in a line.

[stevengj]

@. is JuliaLang/julia#20321