mathjax iframe injection
Merge branch 'develop' into feature/mathjax

Conflicts:
	js/views/reader_view.js
initial experimentation
Merge remote-tracking branch 'origin/develop' into feature/zoom
Merge branch 'develop' into feature/mathjax

Conflicts:
	js/views/reader_view.js
added mathjax call
Added zoom to fixed layout
Merge
Changes to get zoom working alongside scrollable view
loading mathjax on demand
call to isCurrentViewFixedLayout to chek for fixed layout view type
in progress
fixed fixed_view
Merge branch 'release/0.14' into develop
fixed bug with spineItem not passed to loadIframe in one_page_view.js
if spine item property set to pre-paginated that flow is ignored
Changed synthetic spread property passing
If rendition spread is not specified in the book use double for lanscape
Merge branch 'develop' into feature/zoom
introduced named values for scroll and syntheticSpreade settings froperties