EWD progress

[federeghe]

This PR implementes:

• All EWD logic
• Takeoff & Landing MEMOs
• Takeoff config warnings
• Informational messages (seat belts, no smoking, irs alignment, gnd spoilers armed)
• A few of failure messages (altn law, direct law, brakes hot)
• STS and ADV indicators (only datarefs and graphics, no logic)
• Some fixed in the flight phase computation

What is not working:

• Pushbutton logic (CLR, RCL and EMER CANC), but ready to be implemented once buttons will be available
• Side-actions, like status page change or master caution/warning triggering
• All the other messages
• Probably something else I don't remember now :smile: