Merge pull request #175 from modprox/gh-172

gh-172 : update all modules, finally purging old minimocks

Merge pull request #174 from modprox/gh-173

#173 : make it easier to add pre-module modules

Merge pull request #170 from modprox/gh-169

gh-169 : correctly sort version tags listed from index

Merge pull request #168 from modprox/gh-130

gh-130 : listing modules should be exact match

Merge pull request #167 from modprox/gh-166

gh-166 : eliminate mutual dependency on taggit

nobug : run go mod tidy

Merge pull request #161 from modprox/gh-160

gh-160 : eliminate use of shoenig modules

Merge pull request #158 from modprox/gh-147

gh-147 : remove concept of manual go-get transform; auto is now alway…

gh-142 : ensure that exactly one of disk or db storage is configured

nobug : rebuild with corrected petrify and taggit