Add basic line change counts for each x.x.0 library versions.
import line change counts during import_commits task.
Add update_issues management command for importing Issues for each LibraryVersion.
Add update issues runnable command in Issue admin.
Build word cloud using mailinglist content.
Update release report with new data.
This is a portion of the work needed #1287.
We still need to fetch dependencies and show release notes in the release report, but this PR is getting large. Those will be done in separate PRs
import_commitstask.update_issuesmanagement command for importing Issues for each LibraryVersion.Issueadmin.This is a portion of the work needed #1287. We still need to fetch dependencies and show release notes in the release report, but this PR is getting large. Those will be done in separate PRs