2.0.0 Release

[nigelgbanks]

Be sure to add required steps for rebuilding Solr index / exporting configuration instructions in the release notes.

See discussion here: #244

[nigelgbanks]

Also need a set of steps for upgrading Matomo, as we are bumping to the next major version and it requires database changes.

[g7morris]

@nigelgbanks I think we've hit all the metrics for this. Closing this issue