Diagram: Basic support for hierarchical diagrams
Diagram: IConnectionType.create is allowed to return null
check for units with the same name
Merge branch 'master' of github.com:mbeddr/mbeddr.core
generic units are also checked for duplicate names
small fix
Merge branch 'master' of github.com:mbeddr/mbeddr.core
sane error message when path to make is null
Merge branch 'master' of github.com:mbeddr/mbeddr.core
mps now gets max. 3 GB heap when building mbeddr from command line
Merge branch 'master' of github.com:mbeddr/mbeddr.core
Merge branch 'master' into refactor/graphicalSM