Converted bg.jpg from progressive to baseline and reduced quality to 70%. Added workaround for mobile that does not use CSS background-size. Modified viewport meta.
Revert "Converted bg.jpg from progressive to baseline and reduced quality to 70%. Added workaround for mobile that does not use CSS background-size. Modified viewport meta."

This reverts commit 0210c3a98e51ced68b4910c4369039cff058d100.
Have background fallback to a sky blue color instead of white.
Merge pull request #6 from seabre/issue-6

Background image not showing up on mobile (iphone)
Update README.md