* Updating client dependancies. Switching to using yarn.
* Updating React
* Moving pure components to using function syntax (performance gains with newer react version)
* Updating client dependancies.
* Ignore .yarninstall
* Enabling pre-lockfile because it's the entire point of using yarn.
* Removing old webpack config
* Moving to new prop-types
* Fixing ESLint Errors
* Updating jest snapshots.
* Cleaning up package.json
* PLT-3640 Moved all clientside user agent snooping into a single file
* PLT-3640 Added mobile landing pages on login to iOS and Android web apps
* PLT-3640 Moved landing page to appear before first login
* PLT-3640 Fixed detection of Chrome on Android
* PLT-3640 Disabled mobile landing pages when their respective URLs are set to blank