Fix multiple affiliations

Bug Fixes

• fix regression when multiple affiliations #190

Attrib v Cite

Bug Fixes

• attrib: create span not cite #189
• [book] add meta viewport tag #188

support @specific-use

Features

• preserve specific-use attribute (in general) #187

support <verse-group>

Features

• support #186

Bug fixes

• [contrib] always create dd for affiliation #185

support <target>

Features

• support #184

support for <img>

Features

• <img>: preserve src and alt #183

graphic customization

Features

• graphics: preserve specific-use #182

Improve <subtitle>

Features

• improve <subtitle> handling #181

Preserve attributes on stylistic elements

Bug fixes

• preserve attributes "stylistic" elements (italic, bold, roman, sc, monospace) #180

secheading: handle label

Features

• support secheading/label #179