Merge pull request #1 from gdbgauda/master

Merge von Gautam: Ausführlichere Namen im Inhaltsverzeichnis. Vielen Dank!
weitere kleine Änderungen an den Einträgen im Inhaltsverzeichnis
updated readme with credits to participating users
fixed minor bugs
Added direct links to PDF-files in readme
updated readme
improved table of contents entries
added a few more table of contents entries
added figure "Kleinsche Flasche"
reworked proof of 9.8 by adding missing figure
Merge pull request #1 from JaMeZ-B/master

Update changes from JaMeZ-B