Aufgabe A (Semi-Fibonacci-Zahlen)

Signed-off-by: Patrick Kontschak <patrick.kontschak@gmail.com>
Add Matrix.java

This is the code for Aufgabe B given by our professor.

Signed-off-by: Patrick Kontschak <patrick.kontschak@gmail.com>
Add Matrix.java with code

Well, this code SHOULD work. But for some reason it doesn't.
I try to do "java Matrix.get(0,0)" but I'm being told that that mathod could not
be found.

Signed-off-by: Patrick Kontschak <patrick.kontschak@gmail.com>