Draft: Explore
- Swapped out WalletAvailableBalance for AvailableBalance (imported from React Native version). Currencies now support 8 options, any primary/secondary, any BCH denomination, with live updating rates.
- Added react-native-web to support copy-pasting existing Selene work
- Added redux-persist so that currency exchange rates and settings persist between sessions
- Added Apollo for querying the sever
- Added live content feed to Explore page
- Added Tip sending from explore page, including custom amounts
- Updated the send number pad to use the multi currency system, not allow invalid transaction amounts