Rebase of changes to sensor_hil_fixedwing branch.
Change default vehicle type to fixedwing.
Fixed HIL state machine issue with reboot.
Reboot fix.
Working on comments.
Reduced stack size for mavlink receiver.
Fixed comment.
More fixes.
Added assertion, fixed formatting.
More formatting.
Changed fault tolerances.
Merge pull request #156 from jgoppert/sensor_hil_rebase

Rebase of changes to sensor_hil_fixedwing branch.