* Add framework for built-time feature selection
* Allow MQTT, NTP, OTA features to be disabled at build time
* Allow Project screens to be disabled at build time
* Allow security features to be disabled at build time
* Switch to std::function for StatefulService function aliases for greater flexibility
* Bump various UI lib versions
* Update docs
* simplify props set to constant true
* reduce icon size in users table for better small screen compatibility
* use lib_compat_mode property over library exclusion
* get travis to build esp32 environment in addition to esp8266 during CI build
* Re-engineer UI in TypeScript
* Switch to named imports where possible
* Restructure file system layout
* Update depencencies
* Update README.md
* Change explicit colors for better support for dark theme
