* Squashed commit of the following:

commit 96c5901ab197e060219bdb0040d435cf95837d57
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Thu Nov 5 15:33:38 2020 -0800

    Rename experimental to fastmri_examples

commit a5fc77e21db1c09252abf7362805184f0667eec1
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Thu Nov 5 13:45:30 2020 -0800

    Fix test transforms

commit c367b4a9d54030381fd80588220cbec6295a1eae
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Tue Nov 3 14:33:36 2020 -0800

    Update docstrings

commit 8c4fe2b846ffeba1a3767220578723d44008a8bc
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Tue Nov 3 14:31:33 2020 -0800

    Correct types for datatransform

commit ab2313073e99bb4acbbc4e45ed756f625c3b462e
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Tue Nov 3 11:04:37 2020 -0800

    Fix varnet transform

commit 94b9916f42af070fcef04c5b9c8f81a50f8bd296
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Tue Nov 3 09:48:56 2020 -0800

    Reset combine test val

commit a29cadd970e2ee4fd6844280889f7f164bdec87f
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Tue Nov 3 09:42:24 2020 -0800

    Fixes for test split masks

commit 5e0457b1c237f6ed92638f4579e2ab4ea439b86c
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Tue Nov 3 09:14:28 2020 -0800

    v2 conversion

commit fda0f23d498979c63e35bbea91da91201b627299
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Mon Nov 2 06:50:21 2020 -0800

    Fix for leaderboard submission training

commit a00d72322746e979d2951f44c0db3cc74901d933
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Fri Oct 30 10:07:05 2020 -0700

    Rename variables

commit 8ee70cfca57aafbc5a57eb52072b97a5c2716909
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Fri Oct 30 09:20:47 2020 -0700

    Code quality

commit 1b12d437b916343a239d79e25ef23268be04820d
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Thu Oct 29 20:36:55 2020 -0700

    Only prepare if cache

commit e9748bf3b2e4439cc4700e6caedb183a487244a0
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Thu Oct 29 20:29:40 2020 -0700

    Add data prep for cache handling

commit 9a720bde444568ccba481be8396485e4ce045732
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Thu Oct 29 15:54:40 2020 -0700

    Fix for typing

commit dc1c7396b9a8527ef75fe847eb8cd2d4666f0351
Author: Matthew Muckley <matt.muckley@gmail.com>
Date:   Thu Oct 29 15:31:53 2020 -0700

    Squash new leaderboard submission commits

* Fix name of combine_train_val

* Add combine_train_val

* Fix for volume_sampler

* Remove unused import

* Refix volume_sampler

* Fix list init

* Disable pylint

* Random seed fix

* Re-fix worker_init_fn

* numpy comment

* Test loop fix

* Re-date files

* Fix for evaluate gt range