New Modeler component
* Invalid default metric name - [Issue 82](https://github.com/MLBazaar/Cardea/issues/82) by ChengFR
* Parameter 'presort' in 'sklearn.ensemble.GradientBoostingClassifier' has been deprecated since sklearn v0.22 - [Issue 80](https://github.com/MLBazaar/Cardea/issues/80) by ChengFR
* Loading demo data in either FHIR or MIMIC format - [Issue 79](https://github.com/MLBazaar/Cardea/issues/79) by sarahmish
* Fix a customized primitive: Categorizer - [Issue 75](https://github.com/MLBazaar/Cardea/issues/75) by ChengFR
* Update Cardea Class - [Issue 73](https://github.com/MLBazaar/Cardea/issues/73) by sarahmish
* Clean up the modeler - [Issue 71](https://github.com/MLBazaar/Cardea/issues/71) by ChengFR
* Update and clean up the dependencies - [Issue 70](https://github.com/MLBazaar/Cardea/issues/70) by ChengFR