updated gitignore
Merge branch 'master' of https://github.com/JaMeZ-B/latex-wwu

# By Tazdr (5) and others
# Via Tazdr (1) and moregrey (1)
* 'master' of https://github.com/JaMeZ-B/latex-wwu:
  revision bis 2.18
  revision bis 2.2
  revision bis 4.8
  Strukturkorrektur
  added today's lecture (EZT)
  added second half of today's lecture
  added first half of today's lecture