Schema update: alphabetical order, added Integrators with repository property,...

See merge request memri/pyintegrators!9

Gmail

See merge request memri/pyintegrators!8

schema update: alphabetical order, added Integrators with repository property, WhatsApp functionality

- Added support for importers in addition to indexers
- Changed DEFAULT_POD_ADDRESS to remove the v2

# Conflicts:
#	integrators/_nbdev.py

Start face indexer, API's to 1) compute similarity, 2) do detection.

See merge request memri/pyintegrators!7

Docker + docs

See merge request memri/pyintegrators!6

# Conflicts:
#   .gitignore
#   README.md
#   docs/index.html
#   docs/indexers.indexer.html
#   integrators/indexers/indexer.py
#   nbs/index.ipynb
#   nbs/indexers.indexer.ipynb

- Added support for non-gmail-based IMAP

- Started implementing files/attachment downloading

- GmailImporter now gets the username+password from an importerRun-item

- Emails, Contacts and MessageThreads are now written to the pod too (EmailMessages are not yet linked on threadId)

Starting integration tests for indexer

See merge request memri/pyintegrators!5