Pulled losToEcf shared functions out into Utilities class (#174)

* Initial steps to pull common camera model or math utility functions into a separate Utilities file.

* dos2unix line endings again

* ../include/usgscsm/UsgsAstroLsSensorModel.h

* updates to modularized functions

* dos2unix UsgsAstroFrameSensorModel

* Forgot to actually add the Utilities class

* Keep needed to unix2dos to re-fix line ending caracters

* We have some dos line ending and some unix line endings in our code