add timestamp to base template to check on caching
Merge pull request #170 from ryanpitts/master

timestamp to base template to check on caching
remove per-site caching from middleware
use cache_page on views instead, don't need to adjust for Vary header for now
Merge pull request #172 from ryanpitts/master

switch from per-site to cache_page caching
Merge pull request #171 from mozilla/development

update caching on live site