added MacBook Pro Hi-Res (2010)

Before Retina: http://support.apple.com/kb/sp582
Update screens.json
Merge pull request #34 from jorgecasar/gh-pages

Updated BlackBerry 10 devices
Merge pull request #29 from fibric/patch-1

added MacBook Pro
Added 20" Cinema Display
Added dppx value for HTC One

Chrome in the HTC one reports height/width of 640/360, which is 1/3 of
the DPI of 1920/1080, so I assume means a dppx of 3.
Opting out of Jekyll for my fork of this project

I don't need to build it...
Merge pull request #38 from walterdavis/patch-1

Added 20" Cinema Display
Merge pull request #39 from alastc/gh-pages

Added dppx value for HTC One
Decode location.hash before using
Added Nokia Lumia 1020 and 925
Added Lumia 720, 822, 620, 625, 521, and 520.
Merge pull request #43 from UzEE/gh-pages

Added more Nokia Lumia devices
Merge pull request #42 from greystate/issue-41

Decode location.hash before using
Always set a background color on the body
Merge pull request #46 from nhoizey/patch-1

Always set a background color on the body