FSX-multi-FD v1.0.1228b

Update: Completely re-wrote FSX class and made the code more efficient
by using data arrays for storing variables.

Purpose: Display flight simulator information on 7-segment displays.

Change Log:
- Re-wrote FSX class
- Created Display class
- used int arrays for constants
- used int arrays for datasets
- used for loops for reading/writing to arrays
- made code more efficient/readable