Added
* Added new dataset versioning system,
you can work with multiple versions
of the same dataset during creation
* Added new in-Python download system,
you can download a specific version
of the dataset during initialization
Changed
* Refactored dataset indexing system,
a dedicated directory will be created
for the index database during initialization
* Refactored preprocessing cache system,
a dedicated directory will be created
and a faster version for cache coherence
check has been implemented
* Refactored logging system
* Update package requirements
* Update README
Removed
* Deprecated Makefile