Added URLs, Licenses and statistics

updated legal mc4 dataset

added large brazilian caselaw dataset

reformatted README

updated data loader to include update from pile of law

Update README.md (#5)

improved dataset card

added uk legislation

added final size of MultiLegalPile

removed more data from pile-of-law, added more documentation and added three more datasets

added more information to dataset card

added first version of the Multi_Legal_Pile