Finish introduction
Finish conclusion and future works
Fix some typos and references to appendices
Remove WUIs from appendix
Add eidesstattliche erklaerung
Process work of proof readers
Add corrections for chapter 3
Add corrections for the introduction
Process first comments on conclusion
Add corrections from proof readers
Use new macro \etal{} for all citations and check for typos with flyspell again; use title-case for bibliography
Fix spelling and import in code