Introduced Selection.
Split up the resources in the web app.
Added "get" flavours for structure/div/etc (Exists check is built in); eliminated checks from the web app.
Moved editions parsing from webapp to viewer.
Divs have a Structure reference (so that the path is self-contained).
Fixed a bug in Div: only local selectors were treated as defined selectors...
Div list parsing inlined.

--HG--
rename : webapp/src/main/scala/org/podval/judaica/webapp/SelectionResource.scala => webapp/src/main/scala/org/podval/judaica/webapp/ContentSelectionResource.scala