another handful of SDK 2.0 changes (also get build products out of repo!)

Here's some more progress on a port, might still be missing a few changes from [my start](https://github.com/natevw/futura-weather/tree/sdk2) but I think overall it's further along since you had worked through some layer stuff I hadn't yet.

Most of the noise below is because you had checked in the build directory and I didn't notice until I did a `pebble clean` and committed. (It seems that clean is ± necessary before a build to get all the actual compile errors, BTW.)

Still more to be done, but hope this helps!