Merge pull request #44 from hrovira/master

updated feature matrix datasets
Merge pull request #45 from hrovira/master

cleaning up datasets
added script to import feature matrices into mongo
adapting to new database schema
updated databases path
Merge pull request #46 from hrovira/reforming-fmx

Reforming feature matrix database schemas
added clinical variables loader
Merge pull request #47 from hrovira/reforming-fmx

added clinical variables loader