boolean member hasReturnStmt added to check if the function already contains a return statement in which case an explicit statement is not generated.
Merge branch 'develop' of https://github.com/Sable/mclab into develop

Conflicts:
	languages/Natlab/src/natlab/backends/vrirGen/Main.java
Merge branch 'develop' of https://github.com/Sable/mclab into develop
Merge branch 'develop' of https://github.com/Sable/mclab into develop

Conflicts:
	languages/Natlab/src/natlab/backends/vrirGen/Main.java
Merge branch 'develop' of https://github.com/Sable/mclab into develop
Merge branch 'develop' of https://github.com/Sable/mclab into develop
Pulling changes to the natlab AST. Support for the parfor loop was added
Merge branch 'develop' of https://github.com/Sable/mclab into develop