Adding support for Float in breeze

[dineshdharme]

Hi David,

I am wondering how difficult or easy it is to add support for Float in breeze.
I have some free time, so I might take a stab at this.

[dlwh]

Getting full coverage is probably just a game of whack-a-mole. I'd just go through the code base and find instances of Double and make sure there's a corresponding Float... Unfortunately I don't think there's an easier way