Merge pull request #163 from jbache/master

Improve aesthetics of qt quick examples
Use Image.PreserveAspectFit when showing the full image
Add overview documentation
Merge pull request #164 from gladhorn/docs

Add overview documentation
Remove "users" example as not that useful
Update changelog.
Merge pull request #165 from nierob/smallImprovements

Small improvements
Some polishing on the examples and updated screenshots