Update documentation and templates for bulk import

[vkirkl]

With the API and UI improvements for bulk import in the 10.8 release, we will need to update documentation and templates.

• Update doc code in repo https://github.com/WildMeOrg/wildbook-docs - (https://github.com/WildMeOrg/wildbook-docs/pull/116)
• Update xlsx template (and possibly create a new csv template) - https://github.com/WildMeOrg/wildbook-docs/issues/112
• Add new videos
• Add UI tutorials

[vkirkl]

Note fix for template can be a sub-issue of this one.

[goddesswarship]

Doc updates are being drafted in https://github.com/WildMeOrg/wildbook-docs/pull/116.

Video tutorials might have to wait until 10.8.0 is in prod if WBIA doesn't cooperate in QA, but so far things are looking good!