Differential throttle control
Use differential throttle for attitude control
Merge pull request #507 from Meumeu/differential-throttle

Differential throttle
Do not use differential throttle if engines are aligned, do not throw exceptions if the solver fails
Automatically deploy solar panels at the end of ascent autopilot
Merge pull request #509 from Meumeu/differential-throttle

Differential throttle bugfix
Merge pull request #510 from Meumeu/deploy-solar-array

Automatically deploy solar panels at the end of ascent autopilot