Samaritan GUI enhancements

- Added Install to Homescreen support for Chrome on Android, theoretically works with Safari in iOS as well.
  - Icon pulled from Person of Interest Wikia.
- Rewrote display animation, triangle hides when text is being displayed.
- Added support for multiple phrases.
  - Click screen for a random phrase.
  - Phrases are in a json file, should make it easy for others to submit phrases.
- Tapping screen makes page go into fullscreen mode.
- Removed triangle image, using unicode for triangle now.