Approvaltests

* .variable() indents lists correctly
* .variable(list, show_types=True) includes types in output
* .use_markers() handle exceptions being thrown in method
* run_all_combinations()
* verify_logging_for_all_combinations()

* SimpleLogger._logger renamed to private
* SimpleLogger.register_logger
* variable has optional parameter: show_types
Example:
python
SimpleLogger.variable("dalmatians", 101, show_types = True)

Produces:
txt
variable: dalmatians = 101 <int>

- Added convenience functions for warnings and variables
- Warnings print the stack trace
- Variables will handle lists and print out each element in the list

Added Simple Logger timestamps and toggles and other convenience methods

Added basic simple logger functionality.

Small publishing fixes for minimal-approvaltests