Resize landing page photo to dimensions used on site
Merge pull request #162 from andrew-polk/feature/resizeLandingPhoto

Resize landing page photo to dimensions used on site
Create a preferences page accessible directly by url

The only preference so far is diverting production analytics.
Use trackLiveAnalytics, not trackAnalytics, for clarity

Users are not turning off analytics completely, just sending them to
the sandbox rather than production analytics project on segment.io.
This helps make that more clear.
Track book downloads in analytics
Merge pull request #163 from andrew-polk/feature/trackDownloads

Track book downloads in analytics
Merge pull request #161 from andrew-polk/feature/prefsPage

Create a preferences page accessible directly by url
Close Preview and remain on detail when back selected
Use a parameter in the url rather than stop the page change
Add comments on why this code is necessary and what it does