Fix typos
Merge branch 'master' of github.com:po3-cwa3/po3-progress-report

Conflicts:
	architecture/sec.tex
	technologies/sec.tex
Update gitignore because nobody wants those .DS_Store files
Fix workload image
Added new workload image
Merge branch 'master' of github.com:po3-cwa3/po3-progress-report
Build pdf