API Rewrite: Create a cleaner, more flexible API for IO and processes

[scottwittenburg]

So far, only crop is supported for raster and pandas datasets. Other features are missing at the moment as well, including filtering, geo transforms, and dataset writers.

[coveralls]

Coverage decreased (-24.8%) to 48.302% when pulling d7c0a05 on api-rewrite into 4737c04 on master.

[johnkit]

Scott, we want to go ahead and merge these changes, even though we know the API will be changing again. FYI once this branch is merged, I'll also be merging my branch with the gaia.show() method.

--john

[scottwittenburg]

Sounds fine to me, do you want me to merge it?

[johnkit]

Yep, go ahead and merge, Scott. (Or if there's a permission issue, let me and Aashish know.)

[scottwittenburg]

I'm just remembering that this would be the first merge to master changing API (and removing much of the functionality), which I think is why I labeled this PR with a WIP. Are we sure we're ready to merge @johnkit and @aashish24?

[aashish24]

@scottwittenburg I believe if you have tagged the current master as old-master, then yes, please go ahead remove the WIP and merge it into master 👍

[scottwittenburg]

Yes, it's tagged master-pre-api-rewrite for future reference. I'll merge this.