Adding Django based caching for all API calls
Fixed unite tests, made some PEP8 changes.
Added a check for mutability
Fixed versions to use the new reader
Merge pull request #263 from ascott1/master

Introduce UI for SxS Analysis
Merge pull request #262 from khandelwal/sxs

Better API caching for site
Updating to new apireader change
Merge pull request #264 from khandelwal/sxs

api_reader changed, and the sidebar code didn't get updated
style SxS header and add 'back' button functionality
update sidebar styles and correct animation
build