Add backend API functionality to export a CSV of selected artworks.

[slivingston]

summary: add capabilities that allow exporting details about artworks in a CSV (comma-separated values) file. Provide option to include raw artwork images, in which case the download file should be a compressed file, e.g., .zip or .tar.gz

for this task:

• create backend API call for generating the CSV and, optionally, a bundle of raw images, given a list of artwork UIDs.
• create UI (frontend) means to use this, at least within the contexts of curation project management pages and search results (for searches that may or may not be within some curation project).

[xstephen95x]

issue created for frontend

[xstephen95x]

Columns of CSV => (open for discussion, consult Naomi )

artwork UID | artwork name | artist name | Year |

[slivingston]

@qiankunzz requested that this feature be given high priority. original request: https://tekumateam2016.slack.com/archives/tech/p1481737619000002

[xstephen95x]

Note that hundreds of high quality images bundled together could have a file size in the 1s of GBs.
Methods to handle large file downloads could be:

• Create a link which directs to where