Dynamic-characterization

* Fixed path to default characterization functions

* Fixed paths for data files

* Fixed packaging issue

* Renamed submodules:
* `dynamic_characterization.timex` -> `dynamic_characterization.ipcc_ar6`
* `dynamic_characterization.temporalis` -> `dynamic_characterization.original_temporalis_functions`
* Renamed function to apply characterization functions to `dynamic_characterization.characterize()`

* Fixed an issue with the path of data files

* Added characterize_dynamic_inventory function that can directly apply functions to a dynamic inventory dataframe. This also includes a function to add a set of default characterization functions based on the CAS-numbers of bioflows
* Improves computational perfomance by using arrays and namedtuple instead of pd.Series