Merge pull request #36 from cfrejavi/code-structure-with-webdeposit

deposit: url_converter import fix
revert publicserver
tag popover: cosmetics
added 'tag' search term
bibformat_dblayer --> formatter.api
Merge pull request #35 from Demestotenes/code-structure-with-webdeposit

revert server, tag fixture, bibformat_dblayer
bibformat_dblayer -> formatter.api 2
Merge pull request #37 from Demestotenes/code-structure-with-webdeposit

bibformat_dblayer -> formatter.api 2
WebSearch: cache import fix