Fix Vector6 Add and GetMagnitude

magnitude is always positive so you can't check if it's negative.
Improve RCS troque

Works better with linear RCS and rotated RCS block
Need more improvement since it still use the same value for P and Y
Improve RCS Torque - Y and P torque are now different
Add a Conics Mode selector in the Node Editor
Fixes to blacklisting support:

-Fixed possible nullrefs in MechJebModuleMenu and MechJebAR202.
-Added try-catch wrappers in MechJebCore around calls to ComputerModule callbacks so that a failure in one ComputerModule doesn't break all the others.
Fixed FuelFlowSimulation not simulating decouplers in first stage.

Also fixed simulation failing to realize that children of launch lamps are decoupled when the launch clamps fire.
Fix incorrect array indices when balancing RCS.
Another fix to handling of the fuelCrossFeed flag in FuelFlowSimulation.
Merge branch 'dev' of https://github.com/MuMech/MechJeb2 into dev
Warp Helper should now persist lead time and warp target.
Fix to Vector6 problem pointed out by sarbian in #88.

We wanted to check whether a certain projection was negative, but the magnitude of a vector is always positive. We really wanted a dot product.
Merge branch 'RCS-Improvement' of https://github.com/sarbian/MechJeb2 into sarbian-RCS-Improvement
Edits to sarbian's RCS improvements.

Mainly, VesselState.rcsThrustAvailable uses world coordinates, not vessel-relative coordinates.
Reverting a temporary change in my local copy of the Maneuver Planner that I accidentally included when merging sarbian's RCS improvements.
Merge pull request #114 from sarbian/Conics-Selector

Add a conic patch draw mode selector in the Node Editor
Edits to sarbian's conics relativity mode selector.
Reworked autostaging.

-Ascent AP has its own autostaging toggle.
-Renamed Thrust Control window to Utilities and added a global autostaging toggle.
-Added an "Autostage once" button to Utilities.
Fixed the window buttons.
Changed "Node burn time" to display one decimal place for when entering burn times into RemoteTech.
Merge pull request #144 from taraniselsu/dev

Fixed the window buttons.