Pmulinka/dir

* reducelronplateau implementation fixed + added test
* added test for _extract_kwargs() in trainer
* added additional coverage for fds_layer
* added lds weight test coverage for losses

* removed adhoc dataset class
* enforced usage of WideDeepDataset class
* changed tabmlp to deeptabular to reflect new naming
* changed tensors to np for WideDeepDataset usage
* swapped X_image dimensions - not sure how this could work before(?)

* I have to add weight support for all regression function in the library

* needs testing + debugging

* I have to add weight support for all regression function in the library

* needs testing + debugging