Updated ARKit, Added AR Navigation Functionality, and Other Changes.

- ARKit library was replaced with a more intuitive library.
- AR Navigation Functionality is implemented
: Navigating to the Navigation Tab will allow users to use their camera
to see hard-coded coordinate-based landmarks.
: Users can press and hold on a landmark to reveal the Details.xib
view, which will tell them they've selected this landmark as a choice.
: After seeing the Details.xib screen, the user can face the camera
down (at the floor) and an arrow will appear on screen and dynamically
change direction based on their chosen landmark's coordnates.
- Changed Icon of User (Now, Quin) and Name.