Add the ability to apply a transform to a linescan model (#340)

* Add the ablility to apply a rotation and translation to a linescan model state

* Make applyTransformToState static

Conflicts:
	include/usgscsm/UsgsAstroLsSensorModel.h
	src/UsgsAstroLsSensorModel.cpp

* Add a test for applyTransformToState and make it public

Minor tidying

Rm unneeded whitespace

Reword comment