New version of reveal.js
Changed width and height of slides
Changes layout first part of presentation
Fixed module 2

Fixed module 2
Fixed 2nd module and 3rd modules, started on 4th module

Fixed 2nd module and 3rd modules, started on 4th module
Started merging data modelling changes with new layout
moved CQL3 section
Some more changes to incorporate merge of data modelling
Merge master into gh-pages
Correct versions of html files

Correct versions of html files - merge failed first time