Driver Update and Re-enable (#381)

* Removed generic divide by 64 on image lines

* Update a chunk of drivers to test with the ale formatter instead of the ISIS formatter

* Updated formatter test names to start with something other than test

* Moved some isds out of the test file and into the isd directory

* Readded cassis driver import

* Made variable names consistent throughout tests and removed commented out xfail decorators

* Added themis vis and ir isds

* Disabled drivers again

* Added xfails back to disabled drivers