Add images to presentation
Change presentation order
Added RavenDB screenshot.
Centered images, removed margins
Merge pull request #366 from matias78/public-presentation-add-images

Public presentation add images
Merge pull request #367 from AlphaGit/public-presentation-add-images

Public presentation add images and styles
Adjustments.
Merge remote-tracking branch 'CommonJobs/master' into public-presentation-add-images
Adjustments