Parsoid/HTML based LST

Issues

 * Paragraph merging across original pages: Text stored as single wiki page per original book page, with paragraphs potentially broken up. When reading, the page breaks should not be visible.
 * Transclusion is primarily by chapter (?) but there are other use case (dictionnaries...)
 * which kind of transclusion is used there? Other kinds of overlapping sections? -- probably straightforward, no mis-nesting

Example of current workflow on wikisource
" Foo  beggining of  "

Page:Foo/2 " paragraph

Chapter 2 "

Result of "  " is: "     Foo

beggining of paragraph "