Merge pull request #11 from leokraemer/SDD

- [X] Projektplan pdf --> .tex
- [X] minor typo fixes
- [X] Added Matthias Miller task section "ISGCIGraphCanvas.java" in Software Architektur
- [X] Added Leo Krämer Parts to SDD
- [X] cleanup, added .pdf to gitignore
tests hinzugefgt