Fixed a few bugs in script detection
Refactored run testing, redid arg-based tests
Added add_stdin tests
Switched to helper-based setup/teardown
Added null test
Chnaged return status based on ret value
Fixed naming bug and changed default return message
Switched to checking for None
Moved remianing script tests to new format and removed old scripts tests
Split out bad scripts into seperate mixin
Moved IO tests over to new format
Deletd Old IO tests
Made submission name a variable
Added Hello Tests
Refactroed run tests to use common base class