updates for Isis support (#277)

* Adds voyager driver and associated tests

* Dictionary diff changes and isis_formatter updates

* Removed unnecessary imports from MRO driver

* Removed voyager playground notebook

* Removed comments on test data.

* Added comments to isis_formatter

* Updated tests based on changes to the isis_formatter

* Updated sun_position again for light time correction

* Naif Keyword update (sledgehammer edition)

* updated test data

* renamed func

* updated as per comments

* passing tests

* getting call stack for python sometimes causes bus error

* removed debug prints

* Updated frame chain, tests, and other drivers

* Cleaned up some logic

* Updated mro test with new frame chain output

* Test updates to mostly quaternions and moves frame_trace into transformation.py

* Added USGS channel to the environment file

* Adds Spiceypy outside of the environment.yml

* Updated python version

* Reverted travis and environment files

* Added back spiceypy to environment file

* Moved channels and updated version

* Install python into the base env

* More messing with travis

* Travis syntax fix

* idk

* mes to mess

* added support for isis kernel group

* updated for isis support

* gettiing more tests passing

* removed notebook changes

* removed vis

* remove test notbook

* removed print

* changed cmakelists as per comments

* revert kaguya changes

* adressing comments

updated ale C++ tests

Updated how Angular Velocity is stored and computed in rotations (#275)

* Added angular velocity to rotations

* In progress commit

* Updated new AV calculations

* In progress commit

* More in progress

* In progress

* Updated rotation

* indexing error fix

* more clean up

* Fixed velocity rotation

* Removed commented line

updating voyager tests

updated testsw

updated tests

* fixed property