Changes to Datasets
New Datasets:
- colorectal
- liver
- novartis
Renamed Datasets:
- bladderpdo -> bladder
- pancpdo -> pancreatic
- sarcpdo -> sarcoma
Removed Datasets:
- cptac
- mpnstpdx (now part of mpnst)
Other changes:
- implemented md5 checksum verification for downloads
- added functionality to generate basic statistics for datasets