Resolve "clippy warnings in CLI merge"

Closes #86

See merge request !36

Resolve "CLI: Add version info also in --version dialog"

Closes #69

See merge request !32

# Conflicts:
#   Cargo.toml

Resolve "Reference nodes are not correctly restored from file"

Closes #62

See merge request !35

Further testing needed.

Add Uuid to OpticRef

Closes #63

See merge request !34

Add unit tests to OpticGraph.
Add unit tests to OpticRef.

Update dependent code accordingly.

Resolve "Optical::analyze add consistency check"

Closes #70

See merge request !33

Check if all ports in light input data a real input ports of the node to
be analyzed. Otherwise data might be silently discarded. This should not
happen if the nodes are properly connected...

Resolve "Beam splitter: Add analysis unit test"

Closes #58

See merge request !30

Resolve "put textlogo as shown in cli into git"

Closes #76

See merge request !31

Update examples & tests accordingly.

Resolve "Spectrometer: Add analysis unit test"

Closes #82

See merge request !29

Resolve "IdealFilter: Add analysis unit test"

Closes #75

See merge request !28

Add name parameter to IdealFIlter::new

Resolve "Detector: Add analysis unit test"

Closes #78

See merge request !27

Resolve "Source: Add analysis unit test"

Closes #77

See merge request !26

Resolve "EnergyMeter: Add analysis_inverse unit test"

Closes #79

See merge request !25

Fixed missing inverted() fn.