Changes to the LegData class.
Some properties are no longer part of this class: ATE, ETA, ATA.

Signed-off-by: Francisco Salinas <fssaez@gmail.com>
Calculations Model 99%
Fuel calculations are still missing, but everything else its working and 
ready to be implemented in the application.

Signed-off-by: Francisco Salinas <fssaez@gmail.com>