Add function to create empty UML model
Add function to apply UML profile
Add function to get SysML profile
Add comments to clarify the steps in Scade project creation
Update transformation
Add support for in/out ports
Create per package scade file with all operators
Remove creation of main.xscade
Fix creation of scade projects by creating types on operator level
Fix bug which created a "null" type for in/out ports
Fix bug to correct in and out port direction
Refactor operator creation function