* new diffexp REST API spec
* new diffexp REST API; faster diffexp and dataframe slicing
* first draft of fast diffexp
* convert variance calculation to two-pass method
* lint
* update front-end use of API
* fix typo in spec
* disable content compression
* catch index filter format errors
* clean up of dead code
* resolve PR review comments
* toast test
* modify webpack build to allow for global CSS; use CSS modules to scope component styling
* remove heatmap
* add label to index resets
* swapping out buttons for blueprint
* adding constants to globals
* swapping out blueprint buttons
* title position, sidebar improvements
* sidebar styles
* adding toasts for validation errors
* zebra section trial
* integrating blueprint, switching buttons over, breaking out scatter
* clean up console
* Create Release_Validation_Recipe.md
* compose middle ware for redux devtools
* update package.json and lock
* remove heatmap, add to left side bar
* redux devtools extension