MIPT-Oulu/solt: Improved API, Speed, bugfix a big release

• [x] SOLT is now PyTorch Native
• [x] All the transform subtract the mean and std by default
• [x] Implemented a proper serialization and deserialization
• [x] Allowed to use dict instead of a data container
• [x] Introduced shorter transform names
• [x] Implemented a fair benchmark to compare with other libraries
• [x] Fixed a bug of JPEGCompression (@tiulpin )
• [x] Added IntensityRemappping transform (@soupault )

This release is not backward comparible,