Merge pull request #121 from noels/master

Initial commit of robots.txt
Add caching to app views
Add caching to blog feature
Add caching to dataset feature
Add cacheing to dataset request feature
Add cacheing to forum feature
Add cacheing and change promo on home page feature
Add cacheing to organogram feature
Remove solr environment from search feature
Add cacheing to taonomy feature
Add moderator role permissions to feature.