HW 8 part 2 added social sharing via AddThis

Added a bunch of social buttons instead of the old brain-dead
icons that were there with the help of the AddThis service.
Verified that they worked via Twitter.
HW 8 part 3 Google Analytics

Added the both forms of google analytics to the site.
Merge branch 'dev' into staging
HW 8 part 4 added bitcoin preorder button
Merge branch 'dev' into staging