Added info items for dry mass, LF+O mass, and monoprop mass.
Merge branch 'dev' of https://github.com/MuMech/MechJeb2 into dev
Fixed loss of settings on creating a new vessel with a MJ command pod.
Removed some debug prints.
Added exception handling for the dV simulation thread.

In the faint hope that it might fix a reported crash.
Improved MoI calculations along the lines suggested in #59.

-VesselState now computes the full 3x3 inertia tensor, and sets VesselState.MoI to be the diagonal components of this 3x3 matrix.
-The effect of each part's inertiaTensor and inertiaTensorRotation is taken into account correctly.

-Also, made a minor fix to the attitude controller, may not have much effect.
Improve node execution across 2+ stages (#63).
Fixed #67 (some maneuver nodes would wrongly be placed at T-0).

This affected some moon-return and interplanetary burns.
Made it clear that final periapsis is only approximate for moon returns and course corrections.
Restored docking AP warning if target is not a docking node.

This used to exist but somehow a line of code got deleted or something.
Fixed ascent AP status not showing.
Made sure "Land at target" can't be invoked when no target exists (#64).

Also sped up some autowarp speeds in the landing AP.
Fix auto-stage 'post' delay affecting 'pre' (#65).
Add a Roll field to the SmartASS SRF mode.
Leave the ascent AP enabled when minimized.
Added settings window that allows switching to the MJ 1 GUI skin.
Fix signs for an angle's text representation.
Added a "restore factory defaults" to the settings window.
Autostaging options now minimize when autostaging is off.
Thrust limiter toggles now light up green when active.