Update old transcripts metadata present in video xml with the new transcripts for backward compatibility.

The published fork seems to be getting updates more regularly than the original project
and has the bugfix we forked for.

Bumps xblock-utils to v1.1.1
Bumps xblock-drag-and-drop-v2 to v2.1.6

React code (in jsx files) was not being extracted at all. Fixed this
by updating to edx-i18n-tools 0.4.5.

Also, template literals (feature of es2015) don't work well with
gettext at all. So convert those instances to HtmlUtils or
StringUtils interpolation calls.

FEDX-505

This reverts commit a7fa0c21.

Add more detail about using hashes/shas for requirements in this file.

Add the back-end and front-end React app for Learner Analytics.
This was mostly authored by @AlasdairSwan and @dianakhuang.

LEARNER-3376