Fix occasional exception in dV sim, and prevent exceptions in StartSimulation from hanging dV stats.
added Force Roll to Ascent AP which tries to keep the roll a 0° when the pitch is below 83°
changed ForceRoll to be constant and not only active within certain angles
FuelFlowSimulation optimizations.

Most importantly, the calculation of the FuelNode.decoupledInStage values
was changed from an O(N^2) algorithm to an O(N) one. Based on profiling
this cuts the cost of StartSimulation by 50-70%.
Faster version of UserPool.RecursiveUser.

Profiling showed that the previous version could be a slight performance problem.
Better alignment for time display
Merge pull request #431 from BloodyRain2k/ForceRoll

Forced Roll for Ascent AP
Merge bk2w Adding Ascent autopilot option to limit the angle of attack during launch #428
Use some of  sanedragon  #426 ideas for the AoA limiter, and clean up tabs.
Optimizations and removal of legacy code in PartExtenions.
Clean up MFE detection.
Cache result of GetMasterMechJeb() in editor too.
Save some work when Toolbar is not available.
Reorganization and some optimization of VesselState.Update()
Fix Landing Prediction bug related to parachute reported by skips on forum.
Finally implement a true combobox utility

Check MechJebModuleManeuverPlanner for an usage example
Merge remote-tracking branch 'mumech/dev' into modularManeuverPlanner
Merge pull request #435 from xytovl/modularManeuverPlanner

Real combobox in GuiUtils
Rework of Ascent AP AoA limiter