Pelutils

- Only works for Python 3.7+

- If logger has not been configured, it now does no logging instead of crashing

This prevents dependecies that use the logger to crash the program if it is not used
- `log.throw` now also logs the actual error rather than just the stack trace
- `log` now has public property `is_verbose`
- Fixed `with log.log_errors` always throwing errors
- Added code samples to `README`
- `Parser` no longer automatically determines if experiments should be placed in subfolders

Instead, this is given explicitly as an argument to `__init__`

It also supports boolean flags in the config file

- Readd clean method to logger

- The logger is now solely a global variable

Different loggers are handled internally in the global _Logger instance

- Add catch property to logger to allow automatically logging errors with with
- All code is now indented using spaces

- Allow finer verbosity control in logger
- Allow multiple log commands to be collected and logged at the same time
- Add decorator for aforementioned feature
- Change thousand_seps from TickTock method to stand-alone function in `__init__`
- Verbose logging now has same signature as normal logging

- Add code to execute code with specific environment variables