Major Changes
* The new citation module. You can now use the `tc cite` module to generate citation for various concepts, such as functionals, methodolgies or programs. You can also supply any DOI code.
* We added the `XTBJob` class that interfaces Grimme's xtb program. This is a tight-binding code that, among other things, supports spin-polarized DFTB calculations.
* The new `cache_file` decorator that stores results in a local file.
* A new timing module that provides an easy way to profile your code.
What's Changed
* Fixed missing settings attribute for ORCAJob by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/226
* Added tcutility.log.rectangle_list by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/224
* Added citation module and added references for many functionals by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/222
* Added the cache_file decorator by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/221
* Implement xtbjob class by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/187
* The timing module by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/229
* New delete_on_fail option for Jobs by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/231
* Check job pre-run function by YHordijk in https://github.com/TheoChem-VU/TCutility/pull/230
**Full Changelog**: https://github.com/TheoChem-VU/TCutility/compare/v0.12.0...v0.13.0