minor cleanup

Removed case folding via std::transform, excessive lowerCase()
replaced with ciEqual().
fix memory leak in AISequence
Fix some typos and accidental commit
Minor correction
Minor fix
Some unneeded includes cleanup
Remove hopelessly outdated nifogre tests
Remove unused btKinematicCharacterController
Closes #1109: Don't reset water level when loading a plugin that does include water level records
Closes #1107: Do not create box shapes unless the box collision flag is enabled
Remove unused Combat stance
Bug #1107: Reverted previous fix, which caused problems with some actors not using a box shape as expected. Instead, do not create a bounding box collision shape for hidden nodes.
Closes #1106: Move stance to CreatureStats, since creatures also have separate run/walk animations.
StopCombat: mark as non-hostile
Unsheath weapon in AiWander