HW: support for inline images.
HW: tweaks in PublicationInfo.
Merge with master.
Generalize JSON download link exposure.
Link name from data object instead of hard-coded.
Cleansing.
Dedicated function for retrieving headings.
Add intro to cover.
Provisional: introduced annotation for labels.

This is a very questionable approach. It is
used to render labels for footnotes (e.g., in
table caption). Instead we might introduce a
node which essentially combines a label and a
paragraph.
Provisional: introduced Footnote which is a Paragraph with label.
Fix date parsing: use explicit constructor instead of dash format.

E.g., new Date("2004-07-11") does not work under Safari and FF.
Show a label for Boxes if available.
Moved screwdriver configuration into '.screwdriver' folder.
Introduce provider property

Determines if intro should be shown
Introduced a 'custom' annotation used as a default for annotated content where we do not
have representation but still want to keep the original type name.
Remove link to elife and link to HW feedback form.
Merge with master.