BrainGlobe Atlas API Version 2

[adamltyson]

This issue tracks the packaging side of #141.

[adamltyson]

Duplicating the information in #141, but the first aim is to move away from the monolithic atlas structure, and towards a more distributed structure.

Each atlas element (e.g. reference image, structures list) will be packaged and hosted separately. A specific atlas will then be defined by a config file, e.g.:

 name: "allen_mouse"
 atlas_link: "http://www.brain-map.org"
 version: 2.0
...
...
reference_images: 
 # could be >1
  STP:  some_identifier
annotation_images: 
 # could be >1
  CCFv3:  some_identifier
structures: some_identifier
meshes: some_identifier

This config file will then point to the individual files needed, e.g.:

[adamltyson]

To begin with:

• Functions to package (download, reorient, resize, compress etc.) each file of a particular type (e.g. reference images)
• Scripts to run all the relevant functions
• Scripts to upload to GIN (for now)
• Parallelise
• Tests

[adamltyson]

To reduce dependency issues, will aim to download all data directly (i.e. not using e.g. the Allen SDK when the data can be downloaded from here)

[adamltyson]

Closing this in favour of #141, now the two repos are merged.