add download button for dev kit

[michielbdejong]

can't test this right now because i don't have roots working

[raucao]

I think just adding a button isn't enough. Let's rework the whole "integrate" page and calls to action when the dev kit is reviewed and ready for prime time.

[michielbdejong]

i added the button for now, we can improve iteratively http://remotestorage.io/integrate/

[michielbdejong]

Let's rework the whole "integrate" page and calls to action when the dev kit is reviewed

OK, i'll do that, but after @skddc puts the jekyll site live (which iiuc will be some time this week)

[raucao]

Button is on the site.