changes support banner ads.
modified copy and logo for banner ad
added missing image file
Made 'presents' logo the default and linked logo in 'ad' version
Merge branch 'master' into integration

* master:
  Made 'presents' logo the default and linked logo in 'ad' version
  added missing image file
  modified copy and logo for banner ad
  changes support banner ads.
Replaced straight quote with smart quote
Added Visual Website Optimizer script for a/b testing
Merge branch 'master' into integration

* master:
  Added Visual Website Optimizer script for a/b testing
  Replaced straight quote with smart quote
added a small amount of SEO by changing p tags to h tags, Also cleaned up css styles.
Fixed broken Content-Type header
Merge branch 'phill' into 'dev'
Fixed sh.js so it displays shell commands' output
Merge branch 'master' into integration

* master:
  Fixed sh.js so it displays shell commands' output
  Fixed broken Content-Type header
  added a small amount of SEO by changing p tags to h tags, Also cleaned up css styles.
Cache-busted CSS
Merge branch 'master' into integration

* master:
  Cache-busted CSS