Merge pull request #148 from willettk/master

Change spelling on tag
Fix to build on case-sensitive file-systems
Switch to sloan only
Merge branch 'master' of github.com:zooniverse/Galaxy-Zoo
Add sleuth
Use public package routes for Zooniverse/Ubret libraries
Move talk path
Other talk paths
Gzip assets
Merge branch 'pr150'
Expanded setup docs
temporary advert for GZQuench
quench logo
Test Chinese translation

Mandarin with Chinese character set - for testing only
Spanish translation

Draft Spanish translation from Ezequiel Treister
Reactivate CANDELS
Change survey ratios
Defer ubret script tag to stop blocking page load
UKIDSS Survey
Fix translated decision trees.