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
Merge branch 'master' of https://github.com/Supernova-Team/cassandra-training
Started merging data modelling changes with new layout
moved CQL3 section
Some more changes to incorporate merge of data modelling
added questions for training
added objectives and summary and moved some sections around
Completed new layout for all modules and cleaned up images folder

Completed new layout for all modules and cleaned up images folder
Merge master into gh-pages